如何选择哪里=列表

Question

select NameCompany from [ParticipateFairList] 
where IdFair=(select Id from [TmpFair] where Parent_FK=88) 

这是正确的？

如何

For Select * From [Table] where ID=`List` or `SubQuery` 

Answer 1

select NameCompany from [ParticipateFairList] 
where IdFair in (select Id from [TmpFair] where Parent_FK=88) 

其中IdFair在（...），而不是在那里IdFair =（...）在这两个

Answer 2

对于MySQL或SQL Server，你要expr IN (list | subquery)。