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这里是故事:我必须实现过滤器。在这个过滤器中有一些我过滤的类别。 其中一个过滤器是“最喜欢的”过滤器(@includeFavourites)。从另一个表中加入唯一ID
我有这个巨大的SQL与分页和排序和一切。现在,当过滤器中的“includeFavourites”选项被点击时,我也必须从不同的表中选择唯一的ID(这些条目存储在不同的数据表中),其中存储了收藏夹。 我试过左外连接,但它为主表中的每条记录返回“最爱数量”记录。合并完全没有帮助。
这里是我的SQL:
--this is needed because stored procedure must know how many days are selected
DECLARE @daysCount int
SET @daysCount = 0
IF (@mon IS NOT NULL)
BEGIN
SET @daysCount = @daysCount+1
END
IF (@tue IS NOT NULL)
BEGIN
SET @daysCount = @daysCount+1
END
IF (@wed IS NOT NULL)
BEGIN
SET @daysCount = @daysCount+1
END
IF (@thu IS NOT NULL)
BEGIN
SET @daysCount = @daysCount+1
END
IF (@fri IS NOT NULL)
BEGIN
SET @daysCount = @daysCount+1
END
IF (@sat IS NOT NULL)
BEGIN
SET @daysCount = @daysCount+1
END
IF (@sun IS NOT NULL)
BEGIN
SET @daysCount = @daysCount+1
END
-- Insert statements for procedure here
SELECT * FROM (
SELECT ROW_NUMBER() OVER
(
ORDER BY
CASE WHEN @OrderBy = 'ND' THEN title END DESC,
CASE WHEN @OrderBy = 'NA' THEN title END,
CASE WHEN @OrderBy = '' THEN title END,
CASE WHEN @OrderBy = 'RD' THEN authorRating END DESC,
CASE WHEN @OrderBy = 'RA' THEN authorRating
) AS Row,
Articles.ArticleId, Articles.userId, Articles.timestamp as datePosted, users.screenName,
defaultSmallImagePath, authorRating, ArticleCosts, title,
FROM Articles
LEFT OUTER JOIN
Users on Articles.userId = Users.userId
LEFT OUTER JOIN
ArticleAdditionalInformation ON ArticleAdditionalInformation.ArticleId = Articles.ArticleId
--JOIN FOR CONTINENT
LEFT OUTER JOIN
Codings as Continent ON Continent.codingKeyId = ArticleAdditionalInformation.continentId AND Continent.languageId = @languageId
-- JOIN FOR COUNTRY
LEFT OUTER JOIN
CodingsAssociated as Country ON Country.codingKeyId = ArticleAdditionalInformation.countryId AND Country.languageId = @languageId
-- JOIN FOR Article TRANSLATION DATA
LEFT OUTER JOIN
ArticlesTranslations ON ArticlesTranslations.ArticleId = Articles.ArticleId AND [email protected]
LEFT OUTER JOIN
ArticleCategories ON ArticleCategories.ArticleId = Articles.ArticleId
WHERE
(
ArticleCategories.categorieId =1 OR ArticleCategories.categorieId =2 OR
ArticleCategories.categorieId =3 OR ArticleCategories.categorieId =4 OR
ArticleCategories.categorieId = 5
) AND
(ArticlesTranslations.title LIKE '%' + @searchString + '%' OR @searchString IS NULL)
-- COST filter
AND
(ArticleCosts < @cost OR @cost = 0)
AND
(ArticleCosts > 0 OR @cost = 0)
--END cost filter
-- EXCLUDE already stored for selected days
AND Articles.ArticleId -- exclude these ArticleIds
NOT IN
(
SELECT DailyContent.ArticleId
FROM DailyContent
WHERE
[email protected] AND
(
[email protected] OR
[email protected] OR
[email protected] OR
[email protected] OR
[email protected] OR
[email protected] OR
[email protected]
)
GROUP BY
DailyContent.ArticleId
HAVING
(COUNT(sectionId) = @daysCount)
)
-- END exclude
) p
WHERE (Row > @startRowIndex AND Row <[email protected] + @pageSize)
ORDER BY Row
END
所以,我只想包括最喜欢的表中是唯一articleIds,当@includeFavourites参数不为null。
任何暗示将不胜感激;)
我使用SQL Server 2008