摘要: SqlServer -- sqlserver 查询库中表数量 SELECT count(1) from sysobjects where xtype = 'u' -- sqlserver 查询表中的字段信息 select a.name tabelname, b.name fields, case c 阅读全文
posted @ 2020-10-13 17:23 好记性不如烂笔头-贾 阅读(245) 评论(0) 推荐(0)
摘要: -- 1条件嵌套查询 SELECT DISTINCT Name FROM DB_Achievement A WHERE A.Name not in( SELECT Distinct S.name FROM DB_Achievement S WHERE S.Achievement <80) -- 2 阅读全文
posted @ 2020-10-13 16:30 好记性不如烂笔头-贾 阅读(199) 评论(0) 推荐(0)