【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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