指定了非布尔类型的表达式... SQL Server

Question

select sp_name, office, comm 
from sperson
where (office,comm) in (select office, min(comm) from sperson group by office);

这适用于Oracle和MySQL。

Answer 1

您需要具有 correlation 的子查询，并且SQL Server将支持语法：

select sp.*
from sperson sp
where comm = (select min(sp1.comm)
              from sperson sp1
              where sp1.office = sp.office
             );

但是，这也可以通过row_number() / dense_rank()函数来实现：

select top (1) with ties sp.*
from sperson sp
order by row_number() over (partition by office order by comm);