具有此结果集
什么逻辑只有在满足以下条件时才有助于结果出现在什么地方?
如果用户传递了TagID 3,则会显示Low
和Low, Medium
。
如果用户输入了TagID 4,则仅显示Low, Medium
如果用户输入的TagID为3和4,则仅显示Low, Medium
。
到目前为止,我已经掌握了这个,但是我在为最后一句话的逻辑而苦苦挣扎
@List AS dbo.ReportingItemIDList READONLY
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
-- Insert statements for procedure here
SELECT RI.ID, ItemContent,
FROM dbo.ReportingItem RI
JOIN dbo.ItemTag IT ON IT.ReportingItemID = RI.ID
JOIN @List ON IT.TagID = [@List].ID
任何建议(不需要这样回答)都是有用的
答案 0 :(得分:1)
因此,您希望所有标签共用itemscontent
。
select itemscontent
from resultset
where tagid in (3, 4)
group by itemscontent
having count(*) = 2; -- 2 is the number of tags