happycd的专栏

UPDATE   table1 SET   c1 = { fn CONCAT(id=, CONVERT(varchar, c2)) } 

数据库中当前时间的数据减当天0点的值，算出今天的累计量。如果现在时间为0点，则减去前一晚0点的值。 declare @newValue intdeclare @oldValue intdeclare @newTime datetimedeclare @oldTime datetimeselect @newTime= (select max(writedate)fro

 use bbsDB go if exists(select * from sysobjects where name='bank') drop table bank if exists(select * from sysobjects where name='transInfo') drop table transInfo go create table bank ( customerName ...