MySQL之mysql客户端工作的批处理一些使用手法

通常我们会用mysql这个客户端程序来连接mysql库、这个通常是工作在交互式模式下的、如我们连接上mysql并执行如下操作：

mysql -uroot -h127.0.0.1 -P3306
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 96
Server version: 5.7.17-enterprise-commercial-advanced-log MySQL Enterprise Server - Advanced Edition (Commercial)

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Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.

mysql> 

这个时候我们就可以通过sql语句来完成与数据库的交互操作了如：

use tempdb;
Database changed
mysql> desc person;
+-------+------------+------+-----+---------+----------------+
| Field | Type       | Null | Key | Default | Extra          |
+-------+------------+------+-----+---------+----------------+
| id    | int(11)    | NO   | PRI | NULL    | auto_increment |
| name  | varchar(8) | YES  | UNI | NULL    |                |
+-------+------------+------+-----+---------+----------------+
2 rows in set (0.01 sec)

mysql> select * from person;
+----+------+
| id | name |
+----+------+
|  1 | a    |
|  2 | b    |
|  3 | c    |
+----+------+
3 rows in set (0.00 sec)

mysql> 

说了这么多只是为了把今天的主角引出来、这个就是mysql批处理模式

1、批处理方式执行单条语句

mysql -uroot -h127.0.0.1 -P3306 -e"select * from tempdb.person"
+----+------+
| id | name |
+----+------+
|  1 | a    |
|  2 | b    |
|  3 | c    |
+----+------+

2、以输入重定向的方式执行一个sql脚本文件

cat /tmp/script.sql 
select * from tempdb.person;


mysql -h127.0.0.1 -uroot </tmp/script.sql 
id    name
1    a
2    b
3    c

3、以source 语句的方式执行一个sql脚本文件

mysql -h127.0.0.1 -uroot -e"source /tmp/script.sql"
+----+------+
| id | name |
+----+------+
|  1 | a    |
|  2 | b    |
|  3 | c    |
+----+------+

4、不知道你有没有发现不同的执行方式对应的输出格式会有不同、如例2中的输出就没有格式化成表格、这里我们要讲一下

mysql批处理模式下对输出格式的定制 -t 以表格方式输出 -v 输出的同时打印所执行的sql语句

mysql -h127.0.0.1 -uroot </tmp/script.sql -t
+----+------+
| id | name |
+----+------+
|  1 | a    |
|  2 | b    |
|  3 | c    |
+----+------+


mysql -h127.0.0.1 -uroot </tmp/script.sql -v
--------------
select * from tempdb.person
--------------

id    name
1    a
2    b
3    c


mysql -h127.0.0.1 -uroot </tmp/script.sql -tv
--------------
select * from tempdb.person
--------------

+----+------+
| id | name |
+----+------+
|  1 | a    |
|  2 | b    |
|  3 | c    |
+----+------+

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