Linq distinct record containing keywords

Question

I need to return a distinct list of records based on a car keywords search like: \"Alfa 147\"

The problem is that, as I have 3 \"Alfa\" cars, it returns 1 + 3 records (i

Answer 1

The kac is not filtering words... so this joins of kac, kac1 and kac2 will return 3 lines, cause this is the numbers of keywords for this ad

You should remove it..

Try this:

SELECT DISTINCT 
    c.Id, c.Name /*, COUNT(Number of Ads in the KeywordAdCategories table    with those 2 keywords) */
FROM 
    Categories AS c
INNER JOIN 
    KeywordAdCategories AS kac1 ON kac1.Keyword_Id = (SELECT Id 
                                                      FROM Keywords 
                                                      WHERE Name = 'ALFA')
                                AND kac1.Category_Id = c.Id
INNER JOIN 
    KeywordAdCategories AS kac2 ON kac1.Ad_Id = kac2.Ad_Id 
                                AND kac2.Keyword_Id = (SELECT Id 
                                                       FROM Keywords 
                                                       WHERE Name = '147')
                                AND kac2.Category_Id = c.Id

I did a test...

Setting the ambient as

    declare @Keywords table(id int,name varchar(max))
    insert into @Keywords(id,name)
    values (1356,'ALFA')
    ,(1357,'ROMEO')
    ,(1358,'145')
    ,(1373,'147')

    declare @Categories table(id int, name varchar(max))
    insert into @Categories(id,name)
    values (1,'Carros')
    ,(2,'Motos')


    declare @KeywordAdCategories table(Keyword_Id int, ad_Id int,Category_Id int)
    insert into @KeywordAdCategories (Keyword_Id , ad_Id,Category_Id)
    values (1356, 1017,1)
    ,(1356, 1018,1)
    ,(1356, 1019,1)
    ,(1357, 1017,1)
    ,(1357, 1018,1)
    ,(1357, 1019,1)
    ,(1358, 1017,1)
    ,(1373, 1019,1)

I run these two queries:

--query 1
SELECT 
    c.Id, c.Name,COUNT(*) as [count]
FROM 
    @Categories AS c
INNER JOIN 
    @KeywordAdCategories AS kac1 ON kac1.Keyword_Id = (SELECT Id 
                                                       FROM @Keywords 
                                                       WHERE Name = 'ALFA')
                                 AND kac1.Category_Id = c.Id
GROUP BY 
    c.Id, c.Name

I get this result set:

  Id          Name       count
  ----------- ---------- -----------
  1           Carros     3

and the second query for two words...

--query 2
SELECT 
    c.Id, c.Name,COUNT(*) as [count]
FROM 
    @Categories AS c
INNER JOIN 
    @KeywordAdCategories AS kac1 ON kac1.Keyword_Id = (SELECT Id 
                                                       FROM @Keywords 
                                                       WHERE Name = 'ALFA')
                                 AND kac1.Category_Id = c.Id
INNER JOIN 
    @KeywordAdCategories AS kac2 ON kac1.Ad_Id = kac2.Ad_Id 
                                 AND kac2.Keyword_Id = (SELECT Id 
                                                        FROM @Keywords 
                                                        WHERE Name = '147')
                                 AND kac2.Category_Id = c.Id
GROUP BY
    c.Id, c.Name

Result set is:

 Id          Name       count
 ----------- ---------- -----------
 1           Carros     1

Is this what you want?