LEFT JOIN Using distinct?

Question

Originally, I have 15 employees on my table. Two of them have the same LastName.

If I leave the E.MAT_EMP selection as it is, it works fine and 15 emplo

Answer 1

Replace the * with the column names you want to show, and don't remove it from the subquery.

    Select ROW_NUMBER() OVER (ORDER BY LastName ASC) as [N°], [LastName], [FirstName] /*other needed columns here*/
From  ( 
        Select E.MAT_EMP, NOM_EMP as [LastName],PRENOM_EMP as [FirstName],
              Item      = day(d)
              ,Value     = 
              case when (D between DEBUT_DRC and FIN_DRC) and STATUS_DRC = ''Accepté'' then ''RC'' 
              when (D between DEBUT_DAB and FIN_DAB) and STATUS_DAB = ''Accepté'' then ''ABS'' 
              when (D between DC_DEBUT and DC_FIN) and STATUS_DC = ''Accepté'' then DCon.CODE_TYPE_CONGE
              else '''' 

              end
         From 
         DEMANDE_RECUPERATION DC RIGHT JOIN EMPLOYE E 
         ON DC.MAT_EMP = E.MAT_EMP 

         LEFT JOIN DEMANDE_ABSENCE ABS
         ON E.MAT_EMP = ABS.MAT_EMP 

         LEFT JOIN DEMANDE_CONGE DCon 
         ON E.MAT_EMP = DCon.MAT_EMP 

         Cross Join (
                        Select Top (DateDiff(DAY,@D1,@D2)+1) D=DateAdd(DAY,-1+Row_Number() Over (Order By (Select Null)),@D1) From  master..spt_values n1
                    ) B
       ) src
 Pivot (max(value) for Item in ('+@Cols+') ) pvt