SELECT OrderNum=(case when item.docnum is not null then item.DocNum else ORDR.DocNum end).....
FROM TB
INNER JOIN...
ON ...
WHERE
我想把这个OrderNum 作为条件查询，需要怎么弄呢.,?
似乎
( case when item.docnum is not null then item.DocNum=1 else ORDR.DocNum=1 end)
这样不行
------解决方案--------------------
( case when item.docnum is not null then item.DocNum else ORDR.DocNum end)=1
------解决方案--------------------
SELECT .....
FROM TB
INNER JOIN...
ON ...
WHERE (case when item.docnum is not null then item.DocNum else ORDR.DocNum end)=XX