mysql 导出导入数据 -csv

Posted 2020-08-27 Avatarx

MySql数据库导出csv文件命令：

mysql> select first_name,last_name,email from account into outfile ‘e://output1.csv‘ fields terminated by ‘,‘optionally enclosed by ‘‘lines terminated by ‘/n‘;

csv文件效果：

 

sunny	Grigoryan	[email protected]
Jon	Siegal	[email protected]
Joe	Siegal	[email protected]
alejandro	medina	[email protected]

 

 

cvs文件导入MySql数据库命令: 
mysql> load data local infile ‘e://input1.csv‘ into table test1 fields termin
ated by ‘,‘lines terminated by ‘/n‘(first_name,last_name,email);
Query OK, 1 row affected, 1 warning (0.00 sec)
Records: 69  Deleted: 0  Skipped: 68  Warnings: 0

mysql> select * from test1;
+----+------------+-----------+--------------------------+
| id | first_name | last_name | email                    |
+----+------------+-----------+--------------------------+
 | 0 | sunny      | Grigoryan | [email protected]
+----+------------+-----------+--------------------------+

FIELDS TERMINATED BY ---- 字段终止字符 
OPTIONALLY ENCLOSED BY ---- 封套符 
LINES TERMINATED BY ---- 行终止符

 

 

通过mysql客户端shell连接到服务器，选择使用的数据库，输入sql代码： 

select * from test_info   
into outfile ‘/tmp/test.csv‘   
fields terminated by ‘,‘ optionally enclosed by ‘"‘ escaped by ‘"‘   
lines terminated by ‘\r\n‘; 

里面最关键的部分就是格式参数

这个参数是根据RFC4180文档设置的，该文档全称Common Format and MIME Type for Comma-Separated Values (CSV) Files，其中详细描述了CSV格式，其要点包括：
(1)字段之间以逗号分隔，数据行之间以\r\n分隔；

(2)字符串以半角双引号包围，字符串本身的双引号用两个双引号表示。

通过执行上述代码，便可以将需要的数据以csv格式导出到执行的文件中。

 

另外，MySQL中导入CSV格式数据的sql代码如下:

load data infile ‘/tmp/test.csv‘  
into table test_info   
fields terminated by ‘,‘  optionally enclosed by ‘"‘ escaped by ‘"‘  
lines terminated by ‘\r\n‘;

 

 

当csv文件中的每一行记录的列数小于数据库表时，以下语句将十分有用：

load data infile "/tmp/appleAppV2_search_day_20110525.csv" into table apple_search_log fields terminated by ‘;‘ lines terminated by ‘/n‘(apptypeId,keyword,searchTime,model) ;

蓝色字部分是亮点。如果数据表包含自增字段，例如自增的ID， 这个语句将十分有用。