Question

我在数据库中有4个表

Users列Id, Email, Password, Active
InformationData列Id, Title, Description, Link
Filters列Id, Keyword, Active
LUserToFilter列UserId, FilterId

现在我想要的是从InformationData表中过滤特定记录，其中标题和描述不包含过滤器表中的关键字，我们根据特定用户ID从LUserToFilter表中选择那些过滤器。

我尝试了这个查询，但它只返回包含过滤关键字的记录，而不返回其他记录。

Create Procedure [dbo].[SP_GetFilteredData]
@userid int
as
begin
select D.* from Filters f
inner join LUsersToFilters L on L.FilterId=F.Id
inner join InformationData D on D.Title like '%'+F.KeyWord+'%' or D.Description like '%'+F.KeyWord+'%'
where L.UserId=@userid
end

请提出任何建议..

Answer 1

SELECT D.* FROM InformationData D
WHERE NOT EXISTS 
   (SELECT * FROM Filters F INNER JOIN LUsersToFilters L ON F.id=L.FilterId
    WHERE (D.Title LIKE '%'+F.KeyWord+'%' OR D.Description LIKE '%'+F.KeyWord+'%')
    AND L.userid = @userid)

Answer 2

Create Procedure [dbo].[SP_GetFilteredData]
@userid int
as
begin
select D.* from Filters f
    inner join LUsersToFilters L on L.FilterId=F.Id
    inner join InformationData D on NOT (D.Title like '%'+F.KeyWord+'%') AND NOT (D.Description like '%'+F.KeyWord+'%')
where L.UserId=@userid
end

从数据库过滤记录

2 个答案: