SQL In Clause Value

Question

我有以下SQL

Select * 
from PS_VENDOR 
WHERE VENDOR IN ('111','222','333','444') 

其中444 VENDOR不存在。但是当我运行SQL时，我应该从IN CLAUSE获取所有4行，并且444只填充BLANK或'X'

我尝试了以下操作并且无法正常工作

Select * 
from PS_VENDOR 
WHERE NVL(VENDOR IN ('111','222','333','444'), 'X');

Answer 1

使用CTE保存您的值，左连接

with V1 as
(
select '111' as VV from dual
union all
select '222' as VV from dual
union all
select '333' as VV from dual
union all
select '444' as VV from dual
)

select VV, PS_VENDOR.*

from V1
left join PS_VENDOR 
  on VENDOR = VV