MySQL数据库表的数据插入修改删除操作及实例应用

Posted 2020-09-16 王醒燕

1.mysql数据库表的数据插入、修改、删除操作SQL语法格式：

 1 CREATE DATABASE db0504;
 2 
 3 USE db0504;
 4 
 5 CREATE TABLE student (
 6     sno VARCHAR (10) NOT NULL UNIQUE PRIMARY KEY,
 7     sname VARCHAR (20) NOT NULL,
 8     ssex enum (‘男‘, ‘女‘) NOT NULL DEFAULT ‘男‘,
 9     sbirth date,
10     sclass VARCHAR (10),
11     zno CHAR (4)
12 ) DEFAULT charset = gb2312;
13 #添加操作
14 INSERT INTO student
15 VALUES(‘2012010713‘,‘丁暖‘,‘女‘,‘1993-9-9‘,‘物联网12-1‘,‘z002‘);
16 
17 INSERT INTO student (sno,sname,ssex,sbirth,sclass,zno)
18 VALUES(‘2011010503‘,‘孔超‘,‘男‘,‘1993-9-19‘,‘自动化11-1‘,‘z006‘);
19 
20 INSERT INTO student (sno, sname, ssex, zno)
21 VALUES(‘2011010521‘,‘韩梅‘,‘女‘,‘z006‘);
22 
23 INSERT INTO student (sname, zno, sno)
24 VALUES(‘韩梅2‘,‘z006‘,‘2011010522‘);
25 
26 INSERT INTO student VALUES
27 (‘2011010501‘,‘孔超1‘,‘男‘,‘1993-9-19‘,‘自动化11-1‘,‘z006‘);
28 (‘2011010505‘,‘孔超2‘,‘男‘,‘1993-9-19‘,‘自动化11-1‘,‘z006‘);
29 (‘2011010504‘,‘孔超3‘,‘男‘,‘1993-9-19‘,‘自动化11-1‘,‘z006‘);
30 (‘2011010505‘,‘孔超4‘,‘男‘,‘1993-9-19‘,‘自动化11-1‘,‘z006‘);
31 #修改操作
32 UPDATE student
33 SET sname = ‘张三‘,sbirth = ‘1993-6-19‘
34 WHERE sname = ‘丁暖‘;
35 
36 UPDATE student SET zno = LEFT (zno, 3);
37 #删除操作
38 delete from student
39 where sname=‘张三‘;
40 
41 #清空表操作
42 truncate student;#高效
43 delete from student;
44 
45 SELECT * FROM student;

插入：insert

修改：update

删除：delete

2.实例开发