mysql常用命令

1. 查看有多少數據庫

   show databases;
   

2. 新建數據庫

    create database db_tree;
   

3. 查看數據庫中的所有用戶

   SELECT User, Host, Password FROM mysql.user;
   

4. 刪除用戶

   drop user 'lczq_aim'@'%';
   

5. 創建用戶

   create user 'xuhuan' identified by 'xuhuan';
   

6. 給用戶授權

   --給相關權限
   GRANT SELECT,INSERT,UPDATE,DELETE,CREATE,DROP,ALTER  ON db_true.* TO 'xuhuan'@'%';
   --給所有權限
   grant all privileges on db_tree.* to 'xuhuan'@'%';