Question

我使用以下语句存储过程。

Create table #pokedex
( tier int,
  idNo int,
  name varchar(50),
  lastbattle datetime );

insert into #pokedex (idNO, name, lastbattle) 
(select A.idNO, A.name, B.lastbattle 
from differenttable A -- this table has data pulled from SAP
inner join alternatetable B -- this table has values inserted from SQLBULKCOPY
on A.idNo = B.idNo) 

update #pokedex set tier = 3;

update #pokedex 
set tier = 2
where idNO in (
select idNO from anothertable)
and tier = 3

Update #pokedex
Set tier = 1
where idNo in (
select idNo from #pokedex where lastbattle is not null 
and tier = 2);

select * from #pokedex
order by tier, lastbattle;

结果

tier    idNO    name    lastbattle
1       001     pidg    null
1       002     ratt    2014-08-22 12:00
1       003     pika    2014-08-22 12:00
2       004     star    null
2       005     muk     null
2       004     mew     null

我的问题：当我的更新条件为lastbattle not null时，为什么第一行有tier = 1。

旁边信息：insert语句抓取由SQLBULKCOPY命令填充的数据，其中用户上传了一个大型Excel文件。

请原谅我对口袋妖怪的爱，作为虚拟数据的替代品。

SOLVED - REPLACED UPDATE STATEMENT WITH
UPDATE #pokedex
SET TIER = 1
WHERE LASTBATTLE IS NOT NULL
AND TIER = 2;

更新datetime不为null的位置 - 导致空值

0 个答案: