SELECT u.UserNumber, u.UserName, c.CarNumber, c.CarName, c.CarEngine, s.BuyLs, s.BuyTime FROM Tb_Sale as s inner join Tb_User as u ON u.UserNumber = s.UserNumber inner join Tb_CarInfo as c ON s.CarNumber = c.CarNumber · · · · WHERE u.UserNumber = 'UI
--查询所有数据库USE mastergoselect [name] from [sysdatabases] order by [name] --查询其中一个数据库test,就可以得到这个数据库中的所有的表名了,语句如下: USE testgo select [id], [name] from [sysobjects] where [type] = 'u' order by [name] --查出v_lyb这个表中所有的字段select [name] from [syscolumns] wher
SELECT b.name AS tablename , a.rowcnt AS datacount FROM sysindexes a , sysobjects b WHERE a.id = b.id AND a.indid < 2 AND OBJECTPROPERTY(b.id, 'IsMSShipped') = 0 ORDER BY a.rowcnt DESC SELECT t.NAME AS TableName , s.Name AS SchemaName , p.rows AS Row
刚有个项目,需要查询水位数据表中的水位信息,及查询降雨量表中统计时段降雨量的数据,以计算出日降雨量,而且时段是前一天8时到后一天8时总共24个小时. 两个子查询: 1.根据当前时间判断统计前天8时到今天8时还是大前天8时到前天8时的时段雨量: select STCD,SUM(DRP) as drp2 from Jialiang.dbo.ST_PPTN_R where STCD'and TM>case ), , )), , )+' 8:00' end and TM<case ), )), , )
ORACLE 查询一个数据表后通过遍历再插入另一个表中的两种写法 语法 第一种: 通过使用Oracle语句块 --指定文档所有部门都能查看 declare cursor TABLE_DEPT and STATUS>-; begin for c in TABLE_DEPT loop INSERT INTO G_KNOWDOCRIGHT(RID,DIRID,DOCID,USERID) VALUES(SYS_GUID(),'权限编号','文档编号',c.ID); end loop; commit;
最近在开发的时候遇到一个mysql的子查询删除原表数据的问题.在网上也看了很多方法,基本也是然并卵(不是写的太乱就是效率太慢). 公司DBA给了一个很好的解决方案,让人耳目一新. DELETE fb.* FROM froadbill.bill fb LEFT JOIN froadbill.refundinfo br ON br.billSeqNo = fb.seq_no WHERE br.billSeqNo IS NULL AND fb.create_time >=' ; froadbill.b
SQL Server 2008 查询所有用户表的T-SQL语句是: SELECT * FROM sysobjects WHERE [xtype] = 'U' 或者是: SELECT * FROM sysobjects WHERE [type] = 'U' 关于xtype和type的区别,下篇日志里会讲到.
