需求描述：

　　mysql客户端，可以在登录到mysql数据库时，指定要连接到哪个数据库

　　这里进行一个测试。

测试过程：

1.mysql通过-D参数指定连接到test数据库

[mysql@redhat6 scripts]$ mysql -uroot -p -D testEnter password: ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)[mysql@redhat6 scripts]$ mysql -uroot -p -D testEnter password: Welcome to the MySQL monitor.  Commands end with ; or \g.Your MySQL connection id is 14Server version: 5.5.57-log MySQL Community Server (GPL)Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql> select database();+------------+| database() |+------------+| test       |+------------+1 row in set (0.00 sec)

备注：通过在-D参数后面指定数据库名字，就连接到了test数据库。

2.通过-D参数，连接到test01数据库

[mysql@redhat6 scripts]$ mysql -uroot -p -D test01Enter password: Welcome to the MySQL monitor.  Commands end with ; or \g.Your MySQL connection id is 15Server version: 5.5.57-log MySQL Community Server (GPL)Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql> select database();+------------+| database() |+------------+| test01     |+------------+1 row in set (0.00 sec)mysql>

备注：通过在-D参数后面指定数据库名字，就连接到了test01数据库。

 

小结：通过-D 参数指明要直接连接到哪个数据库。

 

文档创建时间：2018年3月20日11:37:27