一.Linq语句的应用: var queryAllCustomers = from cust in customers group cust by cust.City into custGroup where cust.City == "London" orderby cust.Name ascending select cust; 1. from 子句引入数据源 (customers) 和范围变量 (cust). 2.where筛选子句(后面是筛选的条件) (1):筛选一张…
一.用户管理: 1.新建用户: >CREATE USER name IDENTIFIED BY 'ssapdrow'; 2.更改密码: >SET PASSWORD FOR name=PASSWORD('fdddfd'); 3.权限管理 >SHOW GRANTS FOR name; //查看name用户权限 >GRANT SELECT ON db_name.* TO name; //给name用户db_name数据库的所有权限 >REVOKE SELECT ON db_n…