DCL JDBC基础创建
DCL管理用户增删查添加用户：* 语法：CREATE USER ‘用户名’@‘主机名’ IDENTIFIED BY ‘密码’;删除用户：* 语法：DROP USER ‘用户名’@‘主机名’;修改用户密码： UPDATE USER SET PASSWORD = PASSWORD(‘新密码’) WHERE USER = ‘用户名’;UPDATE USER SET PASSWORD = PASSWORD(‘abc’) WHERE USER = ‘lisi’;SET PASSWORD FOR
