2017年11月17日
几个简单常用的Sql语句
摘要： select SUM(Gnumber) as Ids from Goods where Cids = '2'; --查Cids为2的Gnumber列的和，列名为Ids select Cids,Plevel from People; select * from Salary; select * from Salary,People where People.Plevel = Salary.Slev... 阅读全文
posted @ 2017-11-17 22:49 _Iniesta 阅读(292) 评论(0) 推荐(0) 编辑