Question

由于子查询返回多个值，因此无法设置@parameter。如果我使用SELECT TOP 1 Name则可行。我该如何解决？

DECLARE @parameter nvarchar(50)

SELECT @parameter = (SELECT Name FROM Choices
JOIN Position ON Position.PositionId = Choices.PositionId
WHERE Choices.CvId=1230)

SELECT * FROM Adverts WHERE Name LIKE '%' + @parameter + '%'

Answer 1

为什么不将2个查询合并为1？

select a.*
from   Choices c
       inner join Position p on c.PositionId = p.PositionId
       inner join Adverts a  on p.Name like '%' + a.Name + '%'
where  c.CvID = 1230

SQL子查询返回多个值

1 个答案: