SQL 将2张不相关的表拼接成2列，批量更新至另一张表

Posted 2020-08-09 名字什么都是浮云

update SO_Master set LotteryNo=t2.LotteryNo,UpdateTime=GETDATE() 
--select sm.LotteryNo,sm.SysNo,t2.LotteryNo
from SO_Master sm
inner join (			
	select 
	SysNo,ROW_NUMBER() over(order by sysno asc) rIndex
	from SO_Master 
	where WebSiteSysNo =6 and SOAmt >=800 and LotteryNo is null  AND OrderDate >=‘2016/09/22 00:00:00‘ and OrderDate<‘2016/09/24 00:00:00‘ and Status not in(-1,-2,-3)
) t1 on t1.SysNo=sm.SysNo
inner join (
	select 
	LotteryNo,ROW_NUMBER() over(order by sysno asc) rIndex
	from SO_Master_Lottery
	 where  status=0 and WebSiteSysNo = 6
) t2 on t1.rIndex=t2.rIndex
where sm.SysNo=1422087 and sm.LotteryNo is null
--order by t1.SysNo asc,t2.LotteryNo asc

SO_master表简称SO,SO_Master_Lottery表简称SML,

1.首先将SO表列查询出来作为更新条件，然后使用Row_Number排序获得序列

2.将SML表列查询出来作为更新值，然后使用Row_number排序获得序列

3.通过序列号将SO表和SML表关联起来,获得所需的更新条件和更新值，如下代码：

select sm.LotteryNo,sm.SysNo,t2.LotteryNo
from SO_Master sm
inner join (			
	select 
	SysNo,ROW_NUMBER() over(order by sysno asc) rIndex
	from SO_Master 
	where WebSiteSysNo =6 and SOAmt >=800 and LotteryNo is null  AND OrderDate >=‘2016/09/22 00:00:00‘ and OrderDate<‘2016/09/24 00:00:00‘ and Status not in(-1,-2,-3)
) t1 on t1.SysNo=sm.SysNo
inner join (
	select 
	LotteryNo,ROW_NUMBER() over(order by sysno asc) rIndex
	from SO_Master_Lottery
	 where  status=0 and WebSiteSysNo = 6
) t2 on t1.rIndex=t2.rIndex
where sm.SysNo=1422087 and sm.LotteryNo is null
order by t1.SysNo asc,t2.LotteryNo asc

4.使用批量更新的SQL执行语法，进行内连接，由更新主表SO_master表关联t1更新条件表，然后内链接t2获得更新值，t1和更新主表SO_master通过外键关联，t2是根据t1的序号关联t2的，然后加上所有查询条件，

主要是带上更新值的列LotteryNo

 

 

其他sql介绍:

下面这个Sql是按照Row_number更新数据的，仅供参考

update SO_Master set LotteryNo =t1.LotteryNo,UpdateTime=GETDATE() from SO_Master sm
inner join(
select SysNo, 168799-ROW_NUMBER()over(order by sysno asc) LotteryNo from SO_Master 
where WebSiteSysNo =6 and SOAmt >=800 and LotteryNo is null AND OrderDate >=‘2016/09/22 00:00:00‘ and OrderDate<‘2016/09/24 00:00:00‘ and Status not in(-1,-2,-3)
) t1 on sm.SysNo=t1.SysNo
where sm.LotteryNo is null