浅谈“Mysql”的基础操作语句
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/*-------------------------------------------读者可以补充内容到下面--------------------------------------------------*/
//修改表名
alter table qq_user rename user;
//修改字段数据类型
alter table user modify qq_id int;
//修改字段名
alter table user change qq_id Id int;
//修改字段名和字段数据类型
alter table user change Id id bigint(6);
//增加字段(可以指定字段增加得位置)
alter table user add Name varchar(50) after id;
//删除字段
alter table user drop Name;
//修改字段得排列位置
alter table user modify Level int after Password;
//删除外键约束
alter table user drop foreign key 外键别名
//删除有外键关联的表
//俩种解决方案 1先删除子表再删除父表（不建议）2先删除子表的约束 再删除父表
//**注意俩点：desc 表 和 show create 表 俩种方法的//表结构的查询 后者更加详细 可以看到外键
//*T-sql语句如何使用check约束
INSERT INTO depts(deptId,depName)
VALUES
(1, ‘人事部‘),
(2, ‘研发部‘),
(3, ‘市场部‘),
(4, ‘培训部‘);
create table depts(
Id int primary key not null AUTO_INCREMENT,
deptId int not null,
depName nvarchar(50));
/*------------------------------------以下是我创建的表，以及如何插入数据------------------------------------*/
************************************************************************************
创建表
CREATE TABLE qquser(
QQID BIGINT NOT NULL AUTO_INCREMENT,
PassWord VARCHAR(100) NOT NULL,
LastLogTime DATETIME,
Online INT NOT NULL CHECK(Online=0 or Online=1 or Online=2),
Level INT NOT NULL,
PRIMARY KEY ( QQID )
);
CREATE TABLE baseinfo(
QQID BIGINT NOT NULL AUTO_INCREMENT,
NickName VARCHAR(100) NOT NULL,
SEX INT check(RelationStatus=0 or RelationStatus=1),
Age INT NOT NULL,
Province varchar(50) NOT NULL,
City varchar(50),
Address varchar(100),
Phone char(100),
PRIMARY KEY ( QQID )
);
CREATE TABLE relation(
QQID BIGINT NOT NULL AUTO_INCREMENT,
RelationQQID BIGINT NOT NULL,
RelationStatus INT NOT NULL CHECK( RelationStatus=0 or RelationStatus=1),
PRIMARY KEY ( QQID )
);
************************************************************************************
QQUser表添加数据
INSERT INTO qquser
(QQID, PassWord, LastLogTime, Online, Level)
VALUES
("54789625
", "add512#&
", "2008-02-16 17:01:35
", "2", "1");
INSERT INTO qquser
(QQID, PassWord, LastLogTime, Online, Level)
VALUES
("88662753
", "admin0219
", "2008-02-19 21:08:50
", "0", "5");
INSERT INTO qquser
(QQID, PassWord, LastLogTime, Online, Level)
VALUES
("8855678
", "guest0221
", "2008-02-21 16:28:20
", "1", "6");
****************************************************************************************
Relation表添加数据
INSERT INTO relation
(QQID, RelationQQID, RelationStatus)
VALUES
("54789625
", "88662753
", "0
");
INSERT INTO relation
(QQID, RelationQQID, RelationStatus)
VALUES
("88662753
", "8855678
", "1
");
INSERT INTO relation
(QQID, RelationQQID, RelationStatus)
VALUES
("154789625
", "8855678
", "0
");
************************************************************************************
Baselnfo表添加数据
INSERT INTO baseinfo
(QQID, NickName, SEX, Age, Province, City, Address, Phone)
VALUES
("54789625
", "蝴蝶飞飞
", "1
", "16", "北京
", "朝阳
", "亚运村
", "37547388157668
");
INSERT INTO baseinfo
(QQID, NickName, SEX, Age, Province, City, Address, Phone)
VALUES
("88662753
", "秋芙蓉
1 your mysql server version for the right syntax to use near ‘\)‘ at line 1 2 mysql> create table qq_user(id int primary key ); 3 Query OK, 0 rows affected (0.01 sec) 4 5 mysql> show tables; 6 +------------------+ 7 | Tables_in_systop | 8 +------------------+ 9 | qq_user | 10 +------------------+ 11 1 row in set (0.00 sec) 12 13 mysql> 14 mysql> 15 mysql> 16 mysql> 17 mysql> 18 mysql> 19 mysql> 20 mysql> 21 mysql> 22 mysql> 23 mysql> 24 mysql> create table qq_user(id int primary key ) 25 -> create table qq_user(id/; int primary key ) 26 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘create table qq_user(id/‘ at line 2 27 -> 28 -> ; 29 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘int primary key )‘ at line 1 30 31 mysql> create table qq_user( 32 -> qq_id bigint primary key, 33 -> Password nvrchar(50) not null, 34 -> ; 35 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘nvrchar(50) not null,‘ at line 3 36 mysql> create table qq_user( 37 -> ; 38 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘‘ at line 1 39 mysql> show tables; 40 +------------------+ 41 | Tables_in_systop | 42 +------------------+ 43 | qq_user | 44 +------------------+ 45 1 row in set (0.00 sec) 46 47 mysql> drop table qq_user; 48 Query OK, 0 rows affected (0.00 sec) 49 50 mysql> show tables; 51 Empty set (0.00 sec) 52 53 mysql> 54 mysql> 55 mysql> create table qq_user( 56 -> qq_id bigint primary key, 57 -> Password nvarchar(50) not null, 58 -> LastLoginTime datetime, 59 -> Oline int, 60 -> Level int); 61 Query OK, 0 rows affected (0.00 sec) 62 63 mysql> show tables; 64 +------------------+ 65 | Tables_in_systop | 66 +------------------+ 67 | qq_user | 68 +------------------+ 69 1 row in set (0.00 sec) 70 71 mysql> descl 72 -> ; 73 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘descl‘ at line 1 74 mysql> desc; 75 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘‘ at line 1 76 mysql> desc qq_user; 77 +---------------+-------------+------+-----+---------+-------+ 78 | Field | Type | Null | Key | Default | Extra | 79 +---------------+-------------+------+-----+---------+-------+ 80 | qq_id | bigint(20) | NO | PRI | NULL | | 81 | Password | varchar(50) | NO | | NULL | | 82 | LastLoginTime | datetime | YES | | NULL | | 83 | Oline | int(11) | YES | | NULL | | 84 | Level | int(11) | YES | | NULL | | 85 +---------------+-------------+------+-----+---------+-------+ 86 5 rows in set (0.00 sec) 87 88 mysql> insert into qq_user values(‘123344‘,‘xiaoguo‘,‘2014-1-1‘,‘1‘,‘2‘); 89 Query OK, 1 row affected (0.00 sec) 90 91 mysql> select *from qq_user; 92 +--------+----------+---------------------+-------+-------+ 93 | qq_id | Password | LastLoginTime | Oline | Level | 94 +--------+----------+---------------------+-------+-------+ 95 | 123344 | xiaoguo | 2014-01-01 00:00:00 | 1 | 2 | 96 +--------+----------+---------------------+-------+-------+ 97 1 row in set (0.00 sec) 98 99 mysql> 100 mysql> 101 mysql> truncate qq_user; 102 Query OK, 0 rows affected (0.00 sec) 103 104 mysql> selcet *from qq_user; 105 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘selcet *from qq_user‘ at line 1 106 mysql> show tables; 107 +------------------+ 108 | Tables_in_systop | 109 +------------------+ 110 | qq_user | 111 +------------------+ 112 1 row in set (0.00 sec) 113 114 mysql> select * from qq_user; 115 Empty set (0.00 sec) 116 117 mysql> alter table qq_user rename user; 118 Query OK, 0 rows affected (0.00 sec) 119 120 mysql> show tables; 121 +------------------+ 122 | Tables_in_systop | 123 +------------------+ 124 | user | 125 +------------------+ 126 1 row in set (0.00 sec) 127 128 mysql> alter table user modify qq_id int; 129 Query OK, 0 rows affected (0.00 sec) 130 Records: 0 Duplicates: 0 Warnings: 0 131 132 mysql> desc user; 133 +---------------+-------------+------+-----+---------+-------+ 134 | Field | Type | Null | Key | Default | Extra | 135 +---------------+-------------+------+-----+---------+-------+ 136 | qq_id | int(11) | NO | PRI | 0 | | 137 | Password | varchar(50) | NO | | NULL | | 138 | LastLoginTime | datetime | YES | | NULL | | 139 | Oline | int(11) | YES | | NULL | | 140 | Level | int(11) | YES | | NULL | | 141 +---------------+-------------+------+-----+---------+-------+ 142 5 rows in set (0.00 sec) 143 144 mysql> alter table user qq_id bigint(6); 145 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘qq_id bigint(6)‘ at line 1 146 mysql> alter table user modify qq_id bigint(6); 147 Query OK, 0 rows affected (0.00 sec) 148 Records: 0 Duplicates: 0 Warnings: 0 149 150 mysql> desc user; 151 +---------------+-------------+------+-----+---------+-------+ 152 | Field | Type | Null | Key | Default | Extra | 153 +---------------+-------------+------+-----+---------+-------+ 154 | qq_id | bigint(6) | NO | PRI | 0 | | 155 | Password | varchar(50) | NO | | NULL | | 156 | LastLoginTime | datetime | YES | | NULL | | 157 | Oline | int(11) | YES | | NULL | | 158 | Level | int(11) | YES | | NULL | | 159 +---------------+-------------+------+-----+---------+-------+ 160 5 rows in set (0.00 sec) 161 162 mysql> 163 mysql> 164 mysql> alter table user change qq_id id 165 -> ; 166 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘‘ at line 1 167 mysql> alter table user change qq_id id int; 168 Query OK, 0 rows affected (0.01 sec) 169 Records: 0 Duplicates: 0 Warnings: 0 170 171 mysql> desc user; 172 +---------------+-------------+------+-----+---------+-------+ 173 | Field | Type | Null | Key | Default | Extra | 174 +---------------+-------------+------+-----+---------+-------+ 175 | id | int(11) | NO | PRI | 0 | | 176 | Password | varchar(50) | NO | | NULL | | 177 | LastLoginTime | datetime | YES | | NULL | | 178 | Oline | int(11) | YES | | NULL | | 179 | Level | int(11) | YES | | NULL | | 180 +---------------+-------------+------+-----+---------+-------+ 181 5 rows in set (0.00 sec) 182 183 mysql> alter table user add Name varchar(20) after id; 184 Query OK, 0 rows affected (0.01 sec) 185 Records: 0 Duplicates: 0 Warnings: 0 186 187 mysql> desc user; 188 +---------------+-------------+------+-----+---------+-------+ 189 | Field | Type | Null | Key | Default | Extra | 190 +---------------+-------------+------+-----+---------+-------+ 191 | id | int(11) | NO | PRI | 0 | | 192 | Name | varchar(20) | YES | | NULL | | 193 | Password | varchar(50) | NO | | NULL | | 194 | LastLoginTime | datetime | YES | | NULL | | 195 | Oline | int(11) | YES | | NULL | | 196 | Level | int(11) | YES | | NULL | | 197 +---------------+-------------+------+-----+---------+-------+ 198 6 rows in set (0.00 sec) 199 200 mysql> alter table user drop Name; 201 Query OK, 0 rows affected (0.00 sec) 202 Records: 0 Duplicates: 0 Warnings: 0 203 204 mysql> desc user; 205 +---------------+-------------+------+-----+---------+-------+ 206 | Field | Type | Null | Key | Default | Extra | 207 +---------------+-------------+------+-----+---------+-------+ 208 | id | int(11) | NO | PRI | 0 | | 209 | Password | varchar(50) | NO | | NULL | | 210 | LastLoginTime | datetime | YES | | NULL | | 211 | Oline | int(11) | YES | | NULL | | 212 | Level | int(11) | YES | | NULL | | 213 +---------------+-------------+------+-----+---------+-------+ 214 5 rows in set (0.00 sec) 215 216 mysql> alter table user modify Level int after Password; 217 Query OK, 0 rows affected (0.00 sec) 218 Records: 0 Duplicates: 0 Warnings: 0 219 220 mysql> desc user; 221 +---------------+-------------+------+-----+---------+-------+ 222 | Field | Type | Null | Key | Default | Extra | 223 +---------------+-------------+------+-----+---------+-------+ 224 | id | int(11) | NO | PRI | 0 | | 225 | Password | varchar(50) | NO | | NULL | | 226 | Level | int(11) | YES | | NULL | | 227 | LastLoginTime | datetime | YES | | NULL | | 228 | Oline | int(11) | YES | | NULL | | 229 +---------------+-------------+------+-----+---------+-------+ 230 5 rows in set (0.00 sec) 231 232 mysql> alter table user modify id bigint(6); 233 Query OK, 0 rows affected (0.00 sec) 234 Records: 0 Duplicates: 0 Warnings: 0 235 236 mysql> desc user; 237 +---------------+-------------+------+-----+---------+-------+ 238 | Field | Type | Null | Key | Default | Extra | 239 +---------------+-------------+------+-----+---------+-------+ 240 | id | bigint(6) | NO | PRI | 0 | | 241 | Password | varchar(50) | NO | | NULL | | 242 | Level | int(11) | YES | | NULL | | 243 | LastLoginTime | datetime | YES | | NULL | | 244 | Oline | int(11) | YES | | NULL | | 245 +---------------+-------------+------+-----+---------+-------+ 246 5 rows in set (0.00 sec) 247 248 mysql> 249 mysql> 250 mysql> show create user; 251 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘user‘ at line 1 252 mysql> show create table user; 253 +-------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 254 | Table | Create Table | 255 +-------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 256 | user | CREATE TABLE `user` ( 257 `id` bigint(6) NOT NULL DEFAULT ‘0‘, 258 `Password` varchar(50) CHARACTER SET utf8 NOT NULL, 259 `Level` int(11) DEFAULT NULL, 260 `LastLoginTime` datetime DEFAULT NULL, 261 `Oline` int(11) DEFAULT NULL, 262 PRIMARY KEY (`id`) 263 ) ENGINE=MyISAM DEFAULT CHARSET=latin1 | 264 +-------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 265 1 row in set (0.00 sec) 266 267 mysql> desc user; 268 +---------------+-------------+------+-----+---------+-------+ 269 | Field | Type | Null | Key | Default | Extra | 270 +---------------+-------------+------+-----+---------+-------+ 271 | id | bigint(6) | NO | PRI | 0 | | 272 | Password | varchar(50) | NO | | NULL | | 273 | Level | int(11) | YES | | NULL | | 274 | LastLoginTime | datetime | YES | | NULL | | 275 | Oline | int(11) | YES | | NULL | | 276 +---------------+-------------+------+-----+---------+-------+ 277 5 rows in set (0.00 sec) 278 279 mysql> alter table user modify Level int(3) default 0; 280 Query OK, 0 rows affected (0.00 sec) 281 Records: 0 Duplicates: 0 Warnings: 0 282 283 mysql> desc user; 284 +---------------+-------------+------+-----+---------+-------+ 285 | Field | Type | Null | Key | Default | Extra | 286 +---------------+-------------+------+-----+---------+-------+ 287 | id | bigint(6) | NO | PRI | 0 | | 288 | Password | varchar(50) | NO | | NULL | | 289 | Level | int(3) | YES | | 0 | | 290 | LastLoginTime | datetime | YES | | NULL | | 291 | Oline | int(11) | YES | | NULL | | 292 +---------------+-------------+------+-----+---------+-------+ 293 5 rows in set (0.00 sec) 294 295 mysql> alter table user modify Olin default 1; 296 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘default 1‘ at line 1 297 mysql> alter table user modify Olin int default 1; 298 ERROR 1054 (42S22): Unknown column ‘Olin‘ in ‘user‘ 299 mysql> alter table user modify Oline int default 1; 300 Query OK, 0 rows affected (0.00 sec) 301 Records: 0 Duplicates: 0 Warnings: 0 302 303 mysql> desc user; 304 +---------------+-------------+------+-----+---------+-------+ 305 | Field | Type | Null | Key | Default | Extra | 306 +---------------+-------------+------+-----+---------+-------+ 307 | id | bigint(6) | NO | PRI | 0 | | 308 | Password | varchar(50) | NO | | NULL | | 309 | Level | int(3) | YES | | 0 | | 310 | LastLoginTime | datetime | YES | | NULL | | 311 | Oline | int(11) | YES | | 1 | | 312 +---------------+-------------+------+-----+---------+-------+ 313 5 rows in set (0.00 sec) 314 315 mysql> alter table user LastLoginTime modify nvarchar(20) default 123456; 316 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘LastLoginTime modify nvarchar(20) default 123456‘ at line 1 317 mysql> alter table user Password modify nvarchar(20) default 123456; 318 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘modify nvarchar(20) default 123456‘ at line 1 319 mysql> desc user; 320 +---------------+-------------+------+-----+---------+-------+ 321 | Field | Type | Null | Key | Default | Extra | 322 +---------------+-------------+------+-----+---------+-------+ 323 | id | bigint(6) | NO | PRI | 0 | | 324 | Password | varchar(50) | NO | | NULL | | 325 | Level | int(3) | YES | | 0 | | 326 | LastLoginTime | datetime | YES | | NULL | | 327 | Oline | int(11) | YES | | 1 | | 328 +---------------+-------------+------+-----+---------+-------+ 329 5 rows in set (0.00 sec) 330 331 mysql> alter table user modify Password varchar(50) default ‘12345‘; 332 Query OK, 0 rows affected (0.01 sec) 333 Records: 0 Duplicates: 0 Warnings: 0 334 335 mysql> desc; 336 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘‘ at line 1 337 mysql> desc user; 338 +---------------+-------------+------+-----+---------+-------+ 339 | Field | Type | Null | Key | Default | Extra | 340 +---------------+-------------+------+-----+---------+-------+ 341 | id | bigint(6) | NO | PRI | 0 | | 342 | Password | varchar(50) | YES | | 12345 | | 343 | Level | int(3) | YES | | 0 | | 344 | LastLoginTime | datetime | YES | | NULL | | 345 | Oline | int(11) | YES | | 1 | | 346 +---------------+-------------+------+-----+---------+-------+ 347 5 rows in set (0.00 sec) 348 349 mysql> alter table user add age int null check(1,100); 350 Query OK, 0 rows affected (0.03 sec) 351 Records: 0 Duplicates: 0 Warnings: 0 352 353 mysql> desc user; 354 +---------------+-------------+------+-----+---------+-------+ 355 | Field | Type | Null | Key | Default | Extra | 356 +---------------+-------------+------+-----+---------+-------+ 357 | id | bigint(6) | NO | PRI | 0 | | 358 | Password | varchar(50) | YES | | 12345 | | 359 | Level | int(3) | YES | | 0 | | 360 | LastLoginTime | datetime | YES | | NULL | | 361 | Oline | int(11) | YES | | 1 | | 362 | age | int(11) | YES | | NULL | | 363 +---------------+-------------+------+-----+---------+-------+ 364 6 rows in set (0.00 sec) 365 366 mysql> alter table user modify age int after password; 367 Query OK, 0 rows affected (0.01 sec) 368 Records: 0 Duplicates: 0 Warnings: 0 369 370 mysql> desc user; 371 +---------------+-------------+------+-----+---------+-------+ 372 | Field | Type | Null | Key | Default | Extra | 373 +---------------+-------------+------+-----+---------+-------+ 374 | id | bigint(6) | NO | PRI | 0 | | 375 | Password | varchar(50) | YES | | 12345 | | 376 | age | int(11) | YES | | NULL | | 377 | Level | int(3) | YES | | 0 | | 378 | LastLoginTime | datetime | YES | | NULL | | 379 | Oline | int(11) | YES | | 1 | | 380 +---------------+-------------+------+-----+---------+-------+ 381 6 rows in set (0.00 sec) 382 383 mysql> alter table user add Name nvarchar(20) not null default ‘guo‘ after id; 384 Query OK, 0 rows affected (0.01 sec) 385 Records: 0 Duplicates: 0 Warnings: 0 386 387 mysql> desc user; 388 +---------------+-------------+------+-----+---------+-------+ 389 | Field | Type | Null | Key | Default | Extra | 390 +---------------+-------------+------+-----+---------+-------+ 391 | id | bigint(6) | NO | PRI | 0 | | 392 | Name | varchar(20) | NO | | guo | | 393 | Password | varchar(50) | YES | | 12345 | | 394 | age | int(11) | YES | | NULL | | 395 | Level | int(3) | YES | | 0 | | 396 | LastLoginTime | datetime | YES | | NULL | | 397 | Oline | int(11) | YES | | 1 | | 398 +---------------+-------------+------+-----+---------+-------+ 399 7 rows in set (0.00 sec) 400 401 mysql> CREATE TABLE baseinfo( 402 -> QQID BIGINT NOT NULL AUTO_INCREMENT, 403 -> NickName VARCHAR(100) NOT NULL, 404 -> SEX INT check(RelationStatus=0 or RelationStatus=1), 405 -> Age INT NOT NULL, 406 -> Province varchar(50) NOT NULL, 407 -> City varchar(50), 408 -> Address varchar(100), 409 -> Phone char(100), 410 -> PRIMARY KEY ( QQID ) 411 -> ); 412 Query OK, 0 rows affected (0.00 sec) 413 414 mysql> show tables; 415 +------------------+ 416 | Tables_in_systop | 417 +------------------+ 418 | baseinfo | 419 | user | 420 +------------------+ 421 2 rows in set (0.00 sec) 422 423 mysql> desc baseinfo; 424 +----------+--------------+------+-----+---------+----------------+ 425 | Field | Type | Null | Key | Default | Extra | 426 +----------+--------------+------+-----+---------+----------------+ 427 | QQID | bigint(20) | NO | PRI | NULL | auto_increment | 428 | NickName | varchar(100) | NO | | NULL | | 429 | SEX | int(11) | YES | | NULL | | 430 | Age | int(11) | NO | | NULL | | 431 | Province | varchar(50) | NO | | NULL | | 432 | City | varchar(50) | YES | | NULL | | 433 | Address | varchar(100) | YES | | NULL | | 434 | Phone | char(100) | YES | | NULL | | 435 +----------+--------------+------+-----+---------+----------------+ 436 8 rows in set (0.00 sec) 437 438 mysql> CREATE TABLE qquser( 439 -> QQID BIGINT NOT NULL AUTO_INCREMENT, 440 -> PassWord VARCHAR(100) NOT NULL, 441 -> LastLogTime DATETIME, 442 -> Online INT NOT NULL CHECK(Online=0 or Online=1 or Online=2), 443 -> Level INT NOT NULL, 444 -> PRIMARY KEY ( QQID ) 445 -> ); 446 Query OK, 0 rows affected (0.00 sec) 447 448 mysql> show tables; 449 +------------------+ 450 | Tables_in_systop | 451 +------------------+ 452 | baseinfo | 453 | qquser | 454 | user | 455 +------------------+ 456 3 rows in set (0.00 sec) 457 458 mysql> desc user; 459 +---------------+-------------+------+-----+---------+-------+ 460 | Field | Type | Null | Key | Default | Extra | 461 +---------------+-------------+------+-----+---------+-------+ 462 | id | bigint(6) | NO | PRI | 0 | | 463 | Name | varchar(20) | NO | | guo | | 464 | Password | varchar(50) | YES | | 12345 | | 465 | age | int(11) | YES | | NULL | | 466 | Level | int(3) | YES | | 0 | | 467 | LastLoginTime | datetime | YES | | NULL | | 468 | Oline | int(11) | YES | | 1 | | 469 +---------------+-------------+------+-----+---------+-------+ 470 7 rows in set (0.00 sec) 471 472 mysql> desc qquser; 473 +-------------+--------------+------+-----+---------+----------------+ 474 | Field | Type | Null | Key | Default | Extra | 475 +-------------+--------------+------+-----+---------+----------------+ 476 | QQID | bigint(20) | NO | PRI | NULL | auto_increment | 477 | PassWord | varchar(100) | NO | | NULL | | 478 | LastLogTime | datetime | YES | | NULL | | 479 | Online | int(11) | NO | | NULL | | 480 | Level | int(11) | NO | | NULL | | 481 +-------------+--------------+------+-----+---------+----------------+ 482 5 rows in set (0.00 sec) 483 484 mysql> CREATE TABLE relation( 485 -> QQID BIGINT NOT NULL AUTO_INCREMENT, 486 -> RelationQQID BIGINT NOT NULL, 487 -> RelationStatus INT NOT NULL CHECK( RelationStatus=0 or RelationStatus=1), 488 -> PRIMARY KEY ( QQID ) 489 -> ); 490 Query OK, 0 rows affected (0.01 sec) 491 492 mysql> show tables; 493 +------------------+ 494 | Tables_in_systop | 495 +------------------+ 496 | baseinfo | 497 | qquser | 498 | relation | 499 | user | 500 +------------------+ 501 4 rows in set (0.00 sec) 502 503 mysql> desc relation; 504 +----------------+------------+------+-----+---------+----------------+ 505 | Field | Type | Null | Key | Default | Extra | 506 +----------------+------------+------+-----+---------+----------------+ 507 | QQID | bigint(20) | NO | PRI | NULL | auto_increment | 508 | RelationQQID | bigint(20) | NO | | NULL | | 509 | RelationStatus | int(11) | NO | | NULL | | 510 +----------------+------------+------+-----+---------+----------------+ 511 3 rows in set (0.00 sec) 512 513 mysql> 514 mysql> 515 mysql> 516 mysql> 517 mysql> 518 mysql> 519 mysql> 520 mysql> INSERT INTO qquser 521 -> (QQID, PassWord, LastLogTime, Online, Level) 522 -> VALUES 523 -> ("54789625 524 "> ", "add512#& 525 "> ", "2008-02-16 17:01:35 526 "> ", "2", "1"); 527 Query OK, 1 row affected (0.00 sec) 528 529 mysql> select *from qquser; 530 +----------+-----------+---------------------+--------+-------+ 531 | QQID | PassWord | LastLogTime | Online | Level | 532 +----------+-----------+---------------------+--------+-------+ 533 | 54789625 | add512#& 534 | 2008-02-16 17:01:35 | 2 | 1 | 535 +----------+-----------+---------------------+--------+-------+ 536 1 row in set (0.00 sec) 537 538 mysql> show tables; 539 +------------------+ 540 | Tables_in_systop | 541 +------------------+ 542 | baseinfo | 543 | qquser | 544 | relation | 545 | user | 546 +------------------+ 547 4 rows in set (0.00 sec) 548 549 mysql> ceate table depts; 550 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘ceate table depts‘ at line 1 551 mysql> create table depts; 552 ERROR 1113 (42000): A table must have at least 1 column 553 mysql> create table depts( 554 -> Id int primary key, 555 -> deptId int not null, 556 -> depName nvarchar(50),); 557 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘)‘ at line 4 558 mysql> create table depts( Id int primary key, deptId int not null, depName nvarchar(50)); 559 Query OK, 0 rows affected (0.00 sec) 560 561 mysql> 562 mysql> 563 mysql> 564 mysql> 565 mysql> INSERT INTO depts 566 -> VALUES 567 -> (‘1‘, ‘人事部‘, ‘ ‘), 568 -> (‘2‘, ‘研发部‘, ‘ ‘), 569 -> (‘3‘, ‘市场部‘, ‘ ‘), 570 -> (‘4‘, ‘培训部‘, ‘ ‘); 571 Query OK, 4 rows affected, 4 warnings (0.00 sec) 572 Records: 4 Duplicates: 0 Warnings: 0 573 574 mysql> show tables; 575 +------------------+ 576 | Tables_in_systop | 577 +------------------+ 578 | baseinfo | 579 | depts | 580 | qquser | 581 | relation | 582 | user | 583 +------------------+ 584 5 rows in set (0.00 sec) 585 586 mysql> select * from depts; 587 +----+--------+---------+ 588 | Id | deptId | depName | 589 +----+--------+---------+ 590 | 1 | 0 | | 591 | 2 | 0 | | 592 | 3 | 0 | | 593 | 4 | 0 | | 594 +----+--------+---------+ 595 4 rows in set (0.00 sec) 596 597 mysql> delect from depts; 598 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘delect from depts‘ at line 1 599 mysql> delete *from depts; 600 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘*from depts‘ at line 1 601 mysql> delete from depts; 602 Query OK, 4 rows affected (0.00 sec) 603 604 mysql> select *from 605 Display all 750 possibilities? (y or n) 606 mysql> select *from depts; 607 Empty set (0.00 sec) 608 609 mysql> INSERT INTO depts 610 -> VALUES 611 -> (‘1‘, ‘人事部‘, ‘ ‘), 612 -> (‘2‘, ‘研发部‘, ‘ ‘), 613 -> (‘3‘, ‘市场部‘, ‘ ‘), 614 -> (‘2‘, ‘研发部‘, ‘ ‘), ; 615 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘‘ at line 6 616 mysql> INSERT INTO depts 617 -> VALUES 618 -> (‘1‘, ‘人事部‘), 619 -> (‘2‘, ‘研发部‘), 620 -> (‘3‘, ‘市场部‘), 621 -> (‘4‘, ‘培训部‘); 622 ERROR 1136 (21S01): Column count doesn‘t match value count at row 1 623 mysql> select *from depts; 624 Empty set (0.00 sec) 625 626 mysql> INSERT INTO depts(deptId,depName) 627 -> VALUES 628 -> (‘1‘, ‘人事部‘), 629 -> (‘2‘, ‘研发部‘), 630 -> (‘3‘, ‘市场部‘), 631 -> (‘4‘, ‘培训部‘); 632 ERROR 1062 (23000): Duplicate entry ‘0‘ for key ‘PRIMARY‘ 633 mysql> desc depts; 634 +---------+-------------+------+-----+---------+-------+ 635 | Field | Type | Null | Key | Default | Extra | 636 +---------+-------------+------+-----+---------+-------+ 637 | Id | int(11) | NO | PRI | NULL | | 638 | deptId | int(11) | NO | | NULL | | 639 | depName | varchar(50) | YES | | NULL | | 640 +---------+-------------+------+-----+---------+-------+ 641 3 rows in set (0.00 sec) 642 643 mysql> INSERT INTO depts(deptId,depName) 644 -> VALUES 645 -> (1, ‘人事部‘), 646 -> (2, ‘研发部‘), 647 -> (3, ‘市场部‘), 648 -> (4, ‘培训部‘); 649 ERROR 1062 (23000): Duplicate entry ‘0‘ for key ‘PRIMARY‘ 650 mysql> alter table depts modify Id int not null atuo_increment; 651 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘atuo_increment‘ at line 1 652 mysql> alter table depts modify Id int atuo_increment; 653 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘atuo_increment‘ at line 1 654 mysql> 655 mysql> 656 mysql> 657 mysql> drop table depts; 658 Query OK, 0 rows affected (0.00 sec) 659 660 mysql> show tables; 661 +------------------+ 662 | Tables_in_systop | 663 +------------------+ 664 | baseinfo | 665 | qquser | 666 | relation | 667 | user | 668 +------------------+ 669 4 rows in set (0.00 sec) 670 671 mysql> create table depts( 672 -> -> Id int primary key AUTO_INCREMENT, 673 -> -> deptId int not null, 674 -> -> depName nvarchar(50),); 675 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘-> Id int primary key AUTO_INCREMENT, 676 -> deptId int not null, 677 -> depName‘ at line 2 678 mysql> show tables; 679 +------------------+ 680 | Tables_in_systop | 681 +------------------+ 682 | baseinfo | 683 | qquser | 684 | relation | 685 | user | 686 +------------------+ 687 4 rows in set (0.00 sec) 688 689 mysql> create table depts( 690 -> -> Id int primary key not null AUTO_INCREMENT, 691 -> -> deptId int not null, 692 -> -> depName nvarchar(50),); 693 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘-> Id int primary key not null AUTO_INCREMENT, 694 -> deptId int not null, 695 -‘ at line 2 696 mysql> create table depts( 697 -> Id int primary key not null AUTO_INCREMENT, 698 -> deptId int not null, 699 -> depName nvarchar(50),); 700 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘)‘ at line 4 701 mysql> create table depts( 702 -> Id int primary key not null AUTO_INCREMENT, 703 -> deptId int not null, 704 -> depName nvarchar(50)); 705 Query OK, 0 rows affected (0.00 sec) 706 707 mysql> show tables; 708 +------------------+ 709 | Tables_in_systop | 710 +------------------+ 711 | baseinfo | 712 | depts | 713 | qquser | 714 | relation | 715 | user | 716 +------------------+ 717 5 rows in set (0.00 sec) 718 719 mysql> desc depts; 720 +---------+-------------+------+-----+---------+----------------+ 721 | Field | Type | Null | Key | Default | Extra | 722 +---------+-------------+------+-----+---------+----------------+ 723 | Id | int(11) | NO | PRI | NULL | auto_increment | 724 | deptId | int(11) | NO | | NULL | | 725 | depName | varchar(50) | YES | | NULL | | 726 +---------+-------------+------+-----+---------+----------------+ 727 3 rows in set (0.00 sec) 728 729 mysql> INSERT INTO depts(deptId,depName) 730 -> VALUES 731 -> (1, ‘人事部‘), 732 -> (2, ‘研发部‘), 733 -> (3, ‘市场部‘), 734 -> (4, ‘培训部‘); 735 Query OK, 4 rows affected (0.00 sec) 736 Records: 4 Duplicates: 0 Warnings: 0 737 738 mysql> select *from depts; 739 +----+--------+-----------+ 740 | Id | deptId | depName | 741 +----+--------+-----------+ 742 | 1 | 1 | 人事部 | 743 | 2 | 2 | 研发部 | 744 | 3 | 3 | 市场部 | 745 | 4 | 4 | 培训部 | 746 +----+--------+-----------+ 747 4 rows in set (0.00 sec) 748 749 mysql> 750 mysql> 751 mysql> 752 mysql> 753 mysql> 754 mysql> 755 mysql> create table employees( 756 -> Id int primary key auto_increment, 757 -> Name nvarchar(22) not null, 758 -> flag varchar(20), 759 -> JoinTime datetime, 760 -> Money decimal, 761 -> adress nvarchar(20), 762 -> mark1 nvarchar(20), 763 -> mark2 nvarchar(20) 764 -> ); 765 Query OK, 0 rows affected (0.01 sec) 766 767 mysql> 768 mysql> 769 mysql> show tables; 770 +------------------+ 771 | Tables_in_systop | 772 +------------------+ 773 | baseinfo | 774 | depts | 775 | employees | 776 | qquser | 777 | relation | 778 | user | 779 +------------------+ 780 6 rows in set (0.00 sec) 781 782 mysql> INSERT INTO employees 783 -> VALUES 784 -> (‘01‘, ‘张三‘, ‘M‘, ‘2‘, ‘2008-02-02 12:12:12‘, ‘3500.00‘, ‘北京‘, ‘ ‘, ‘ ‘), 785 -> (‘02‘, ‘李四‘, ‘F‘, ‘4‘, ‘2007-02-20 13:13:13‘, ‘5000.00‘, ‘上海‘, ‘ ‘, ‘ ‘), 786 -> (‘03‘, ‘王五‘, ‘M‘, ‘1‘, ‘2012-12-30 14:14:14‘, ‘7000.00‘, ‘福建‘, ‘ ‘, ‘ ‘), 787 -> (‘04‘, ‘赵六‘, ‘F‘, ‘2‘, ‘2008-06-06 15:15:15‘, ‘2800.00‘, ‘广东‘, ‘ ‘, ‘ ‘), 788 -> (‘05‘, ‘钱七‘, ‘M‘, ‘4‘, ‘2005-08-21 11:11:11‘, ‘8000.00‘, ‘山东‘, ‘ ‘, ‘ ‘), 789 -> (‘06‘, ‘孙八‘, ‘F‘, ‘2‘, ‘2008-04-16 10:10:10‘, ‘2000.00‘, ‘河北‘, ‘ ‘, ‘ ‘); 790 ERROR 1136 (21S01): Column count doesn‘t match value count at row 1 791 mysql> select *from employees; 792 Empty set (0.00 sec) 793 794 mysql> desc employees; 795 +----------+---------------+------+-----+---------+----------------+ 796 | Field | Type | Null | Key | Default | Extra | 797 +----------+---------------+------+-----+---------+----------------+ 798 | Id | int(11) | NO | PRI | NULL | auto_increment | 799 | Name | varchar(22) | NO | | NULL | | 800 | flag | varchar(20) | YES | | NULL | | 801 | JoinTime | datetime | YES | | NULL | | 802 | Money | decimal(10,0) | YES | | NULL | | 803 | adress | varchar(20) | YES | | NULL | | 804 | mark1 | varchar(20) | YES | | NULL | | 805 | mark2 | varchar(20) | YES | | NULL | | 806 +----------+---------------+------+-----+---------+----------------+ 807 8 rows in set (0.00 sec) 808 809 mysql> alter table employees add deptId int after flag; 810 Query OK, 0 rows affected (0.01 sec) 811 Records: 0 Duplicates: 0 Warnings: 0 812 813 mysql> desc employees; 814 +----------+---------------+------+-----+---------+----------------+ 815 | Field | Type | Null | Key | Default | Extra | 816 +----------+---------------+------+-----+---------+----------------+ 817 | Id | int(11) | NO | PRI | NULL | auto_increment | 818 | Name | varchar(22) | NO | | NULL | | 819 | flag | varchar(20) | YES | | NULL | | 820 | deptId | int(11) | YES | | NULL | | 821 | JoinTime | datetime | YES | | NULL | | 822 | Money | decimal(10,0) | YES | | NULL | | 823 | adress | varchar(20) | YES | | NULL | | 824 | mark1 | varchar(20) | YES | | NULL | | 825 | mark2 | varchar(20) | YES | | NULL | | 826 +----------+---------------+------+-----+---------+----------------+ 827 9 rows in set (0.00 sec) 828 829 mysql> INSERT INTO employees 830 -> VALUES 831 -> (‘01‘, ‘张三‘, ‘M‘, ‘2‘, ‘2008-02-02 12:12:12‘, ‘3500.00‘, ‘北京‘, ‘ ‘, ‘ ‘), 832 -> (‘02‘, ‘李四‘, ‘F‘, ‘4‘, ‘2007-02-20 13:13:13‘, ‘5000.00‘, ‘上海‘, ‘ ‘, ‘ ‘), 833 -> (‘03‘, ‘王五‘, ‘M‘, ‘1‘, ‘2012-12-30 14:14:14‘, ‘7000.00‘, ‘福建‘, ‘ ‘, ‘ ‘), 834 -> (‘04‘, ‘赵六‘, ‘F‘, ‘2‘, ‘2008-06-06 15:15:15‘, ‘2800.00‘, ‘广东‘, ‘ ‘, ‘ ‘), 835 -> (‘05‘, ‘钱七‘, ‘M‘, ‘4‘, ‘2005-08-21 11:11:11‘, ‘8000.00‘, ‘山东‘, ‘ ‘, ‘ ‘), 836 -> (‘06‘, ‘孙八‘, ‘F‘, ‘2‘, ‘2008-04-16 10:10:10‘, ‘2000.00‘, ‘河北‘, ‘ ‘, ‘ ‘); 837 Query OK, 6 rows affected (0.00 sec) 838 Records: 6 Duplicates: 0 Warnings: 0 839 840 mysql> select *from employees; 841 +----+--------+------+--------+---------------------+-------+--------+-------+-------+ 842 | Id | Name | flag | deptId | JoinTime | Money | adress | mark1 | mark2 | 843 +----+--------+------+--------+---------------------+-------+--------+-------+-------+ 844 | 1 | 张三 | M | 2 | 2008-02-02 12:12:12 | 3500 | 北京 | | | 845 | 2 | 李四 | F | 4 | 2007-02-20 13:13:13 | 5000 | 上海 | | | 846 | 3 | 王五 | M | 1 | 2012-12-30 14:14:14 | 7000 | 福建 | | | 847 | 4 | 赵六 | F | 2 | 2008-06-06 15:15:15 | 2800 | 广东 | | | 848 | 5 | 钱七 | M | 4 | 2005-08-21 11:11:11 | 8000 | 山东 | | | 849 | 6 | 孙八 | F | 2 | 2008-04-16 10:10:10 | 2000 | 河北 | | | 850 +----+--------+------+--------+---------------------+-------+--------+-------+-------+ 851 6 rows in set (0.00 sec) 852 853 mysql> INSERT INTO baseinfo 854 -> (QQID, NickName, SEX, Age, Province, City, Address, Phone) 855 -> VALUES 856 -> ("54789625 857 "> ", "蝴蝶飞飞 858 "> 859 "> ", "1 860 "> ", "16", "北京 861 "> ", "朝阳 862 "> ", "亚运村 863 "> ", "37547388157668 864 "> "); 865 Query OK, 1 row affected (0.00 sec) 866 867 mysql> 868 mysql> INSERT INTO baseinfo 869 -> (QQID, NickName, SEX, Age, Province, City, Address, Phone) 870 -> VALUES 871 -> ("88662753 872 "> 873 "> ", "秋芙蓉 874 "> 875 "> 876 "> ", "0 877 "> ", "20", "河南 878 "> ", "南阳 879 "> ", "方城博望 880 "> 881 "> ", "88715783657725 882 "> 883 "> "); 884 Query OK, 1 row affected (0.00 sec) 885 886 mysql> 887 mysql> INSERT INTO baseinfo 888 -> (QQID, NickName, SEX, Age, Province, City, Address, Phone) 889 -> VALUES 890 -> ("8855678 891 "> 892 "> ", "双眼皮の潴 893 "> 894 "> 895 "> ", "1 896 "> ", "38", "北京 897 "> ", "海淀 898 "> ", "双榆树东里 899 "> 900 "> ", "65794968876143 901 "> 902 "> "); 903 Query OK, 1 row affected (0.00 sec) 904 905 mysql> select *from baseinfo; 906 +----------+--------------------+------+-----+----------+---------+-------------------+------------------+ 907 | QQID | NickName | SEX | Age | Province | City | Address | Phone | 908 +----------+--------------------+------+-----+----------+---------+-------------------+------------------+ 909 | 54789625 | 蝴蝶飞飞 910 911 | 1 | 16 | 北京 912 | 朝阳 913 | 亚运村 914 | 37547388157668 915 | 916 | 88662753 | 秋芙蓉 917 918 919 | 0 | 20 | 河南 920 | 南阳 921 | 方城博望 922 923 | 88715783657725 924 925 | 926 | 8855678 | 双眼皮の潴 927 928 929 | 1 | 38 | 北京 930 | 海淀 931 | 双榆树东里 932 933 | 65794968876143 934 935 | 936 +----------+--------------------+------+-----+----------+---------+-------------------+------------------+ 937 3 rows in set (0.00 sec) 938 939 mysql> 940 mysql> 941 mysql> 942 mysql> 943 mysql> 944 mysql> 945 mysql> Relation表添加数据 946 -> INSERT INTO relation 947 -> (QQID, RelationQQID, RelationStatus) 948 -> VALUES 949 -> ("54789625 950 "> ", "88662753 951 "> 952 "> ", "0 953 "> 954 "> 955 "> "); 956 ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘Relation表添加数据 957 INSERT INTO relation 958 (QQID, RelationQQID, RelationStat‘ at line 1 959 mysql> 960 mysql> INSERT INTO relation 961 -> (QQID, RelationQQID, RelationStatus) 962 -> VALUES 963 -> ("88662753 964 "> 965 "> ", "8855678 966 "> 967 "> 968 "> ", "1 969 "> 970 "> 971 "> "); 972 Query OK, 1 row affected (0.00 sec) 973 974 mysql> 975 mysql> INSERT INTO relation 976 -> (QQID, RelationQQID, RelationStatus) 977 -> VALUES 978 -> ("154789625 979 "> 980 "> ", "8855678 981 "> 982 ">
", "0
", "20", "河南
", "南阳
", "方城博望
", "88715783657725
");
INSERT INTO baseinfo
(QQID, NickName, SEX, Age, Province, City, Address, Phone)
VALUES
("8855678
", "双眼皮の潴
", "1
", "38", "北京
", "海淀
", "双榆树东里
", "65794968876143
");
INSERT INTO depts
VALUES
(‘1‘, ‘人事部‘, ‘ ‘),
(‘2‘, ‘研发部‘, ‘ ‘),
(‘3‘, ‘市场部‘, ‘ ‘),
(‘4‘, ‘培训部‘, ‘ ‘);
INSERT INTO employees
VALUES
(‘01‘, ‘张三‘, ‘M‘, ‘2‘, ‘2008-02-02 12:12:12‘, ‘3500.00‘, ‘北京‘, ‘ ‘, ‘ ‘),
(‘02‘, ‘李四‘, ‘F‘, ‘4‘, ‘2007-02-20 13:13:13‘, ‘5000.00‘, ‘上海‘, ‘ ‘, ‘ ‘),
(‘03‘, ‘王五‘, ‘M‘, ‘1‘, ‘2012-12-30 14:14:14‘, ‘7000.00‘, ‘福建‘, ‘ ‘, ‘ ‘),
(‘04‘, ‘赵六‘, ‘F‘, ‘2‘, ‘2008-06-06 15:15:15‘, ‘2800.00‘, ‘广东‘, ‘ ‘, ‘ ‘),
(‘05‘, ‘钱七‘, ‘M‘, ‘4‘, ‘2005-08-21 11:11:11‘, ‘8000.00‘, ‘山东‘, ‘ ‘, ‘ ‘),
(‘06‘, ‘孙八‘, ‘F‘, ‘2‘, ‘2008-04-16 10:10:10‘, ‘2000.00‘, ‘河北‘, ‘ ‘, ‘ ‘);
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