【MySQL 技巧分享】 mysql -e 加 v 简化代码

      mysql -e 生成结果导入指定文件时:
     
     ● 若要同时显示语句本身:-v
     ● 若要增加查询结果行数:-vv
     ● 若要增加执行时间:-vvv 
     

     在一些监控脚本中可以用来简化代码

 

 

㈠ 不带 v 测试:



[mysql@even ~]$ mysql -uroot -poracle -e "SELECT VERSION();SELECT NOW()" > /home/mysql/test.sql

[mysql@even ~]$ cat /home/mysql/test.sql

VERSION()

5.5.16-log

NOW()

2013-05-08 18:06:35





㈡ 带一个 v 测试:



[mysql@even ~]$ mysql -uroot -poracle -e  "SELECT VERSION();SELECT NOW()" -v  > /home/mysql/test02.sql

[mysql@even ~]$ cat /home/mysql/test02.sql

--------------

SELECT VERSION()

--------------



VERSION()

5.5.16-log

--------------

SELECT NOW()

--------------



NOW()

2013-05-08 18:08:40





㈢ 带两个 v 测试:



[mysql@even ~]$ mysql -uroot -poracle -e  "SELECT VERSION();SELECT NOW()" -vv  > /home/mysql/test03.sql

[mysql@even ~]$ cat /home/mysql/test03.sql

--------------

SELECT VERSION()

--------------



VERSION()

5.5.16-log

1 row in set



--------------

SELECT NOW()

--------------



NOW()

2013-05-08 18:14:05

1 row in set



Bye





㈢ 带三个 v 测试:





[mysql@even ~]$ mysql -uroot -poracle -e  "SELECT VERSION();SELECT NOW()" -vvv  > /home/mysql/test04.sql

[mysql@even ~]$ cat /home/mysql/test04.sql

--------------

SELECT VERSION()

--------------



+------------+

| VERSION()  |

+------------+

| 5.5.16-log |

+------------+

1 row in set (0.00 sec)



--------------

SELECT NOW()

--------------



+---------------------+

| NOW()               |

+---------------------+

| 2013-05-08 18:14:49 |

+---------------------+

1 row in set (0.00 sec)



Bye


 

 

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