Sql server lso也试图移动其他过滤器，但事情是一样的。我懂了。你能分享一下你正在谈论的结果集吗？（和它应该是不同的）当然我已经在oringal post.hmmmm以图片的形式发布了它。好啊这就是我从你的描述中理解的。我不相信左连接是问题所在，那么：）。有没有可能它

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lso也试图移动其他过滤器，但事情是一样的。我懂了。你能分享一下你正在谈论的结果集吗？（和它应该是不同的）当然我已经在oringal post.hmmmm以图片的形式发布了它。好啊这就是我从你的描述中理解的。我不相信左连接是问题所在，那么：）。有没有可能它们也不在第一部分子查询中？我会在我的答案中加入基本的左连接示例，这样你就知道我是从哪里来的了。我明白了，对双表连接我忘记了这个概念。很明显，我没有正确地测试你的原始答案。谢谢你的帮助。它确实正确地工作。

SELECT SC.Service_Company_Code
     , SSPM.Mapping
     , COUNT(T.Service_Ticket_Id) AS 'Ticket_Count'
FROM SV_Service_Ticket T
 INNER JOIN KS_SedonaSync_Problem SSP ON T.Sub_Problem_Id = SSP.Problem_Id
  RIGHT JOIN KS_SedonaSync_Problem_Sub_Mapping SSPM ON SSP.SedonaSync_Problem_Sub_Mapping_Id = SSPM.SedonaSync_Problem_Sub_Mapping_Id 
 RIGHT JOIN SV_Service_Company SC ON T.Service_Company_Id = SC.Service_Company_Id
WHERE SC.Vendor_Id = 1
 AND SC.Inactive = 'N'
 AND SC.Service_Company_Id <> 1
 AND SSPM.Inactive = 'N'
 AND T.Ticket_Status <> 'CL'
GROUP BY SC.Service_Company_Code, SSPM.Mapping
ORDER BY SC.Service_Company_Code, SSPM.Mapping

SELECT Q.Service_Company_Code
     , Q.Mapping
     , COUNT(T.Service_Ticket_Id) AS 'Ticket_Count'
FROM (SELECT SC.Service_Company_Id, SC.Service_Company_Code, SSP.Problem_Id, SSPM.SedonaSync_Problem_Sub_Mapping_Id, SSPM.Mapping
      FROM SV_Service_Company SC
       FULL OUTER JOIN KS_SedonaSync_Problem_Sub_Mapping SSPM ON 1=1
        LEFT JOIN KS_SedonaSync_Problem SSP ON SSPM.SedonaSync_Problem_Sub_Mapping_Id = SSP.SedonaSync_Problem_Sub_Mapping_Id
      WHERE SC.Vendor_Id = 1
       AND SC.Inactive = 'N'
       AND SC.Service_Company_Id <> 1
       AND SSPM.Inactive = 'N'
      ) Q
 LEFT JOIN SV_Service_Ticket T ON T.Sub_Problem_Id = Q.Problem_Id AND T.Service_Company_Id = Q.Service_Company_Id
WHERE T.Ticket_Status <> 'CL'
GROUP BY Q.Service_Company_Code, Q.Mapping 
ORDER BY Q.Service_Company_Code, Q.Mapping 

SELECT SC.Service_Company_Code
     , SSPM.Mapping
     , COUNT(T.Service_Ticket_Id) AS 'Ticket_Count'
FROM SV_Service_Company SC
  CROSS JOIN KS_SedonaSync_Problem SSP
  INNER JOIN KS_SedonaSync_Problem_Sub_Mapping SSPM ON SSP.SedonaSync_Problem_Sub_Mapping_Id = SSPM.SedonaSync_Problem_Sub_Mapping_Id
   AND SC.Vendor_Id = 1
   AND SC.Inactive = 'N'
   AND SC.Service_Company_Id <> 1 
  LEFT JOIN SV_Service_Ticket T ON T.Sub_Problem_Id = SSP.Problem_Id
   AND T.Service_Company_Id = SC.Service_Company_Id
   AND T.Ticket_Status <> 'CL'
WHERE SSPM.Inactive = 'N'
GROUP BY SC.Service_Company_Code, SSPM.Mapping
ORDER BY SC.Service_Company_Code, SSPM.Mapping

SELECT SC.Service_Company_Code
     , SSPM.Mapping
     , COUNT(T.Service_Ticket_Id) AS [Ticket_Count]
FROM  KS_SedonaSync_Problem SSP 
 RIGHT JOIN SV_Service_Ticket T 
 ON T.Sub_Problem_Id = SSP.Problem_Id
 RIGHT JOIN KS_SedonaSync_Problem_Sub_Mapping SSPM 
 ON SSP.SedonaSync_Problem_Sub_Mapping_Id = SSPM.SedonaSync_Problem_Sub_Mapping_Id 
 RIGHT JOIN SV_Service_Company SC 
 ON T.Service_Company_Id = SC.Service_Company_Id
WHERE SC.Vendor_Id = 1
 AND SC.Inactive = 'N'
 AND SC.Service_Company_Id <> 1
 AND SSPM.Inactive = 'N'
 AND T.Ticket_Status <> 'CL'
GROUP BY SC.Service_Company_Code, SSPM.Mapping
ORDER BY SC.Service_Company_Code, SSPM.Mapping

T.Ticket_Status <> 'CL'

 LEFT JOIN SV_Service_Ticket T ON T.Sub_Problem_Id = Q.Problem_Id AND T.Service_Company_Id = Q.Service_Company_Id and T.Ticket_Status <> 'CL'

if object_id('tempdb..#tempItems') is not null
    drop table #tempItems;


create table #tempItems (
        id int primary key
        , category varchar(100)
        , subCategory varchar(100)

    )
;

insert into #tempItems (id, category, subCategory)
values (1, 'First', 'subA');
insert into #tempItems (id, category, subCategory)
values (2, 'First', 'subB');
insert into #tempItems (id, category, subCategory)
values (3, 'Second', 'subA');
insert into #tempItems (id, category, subCategory)
values (4, 'NotFound', 'subNotFound');


---------------------------------------------------------

if object_id('tempdb..#tempCounts') is not null
    drop table #tempCounts;


create table #tempCounts (
        id int primary key
        , itemId int
    )
;

insert into #tempCounts (id, itemId)
values (1, 1);
insert into #tempCounts (id, itemId)
values (2, 2);
insert into #tempCounts (id, itemId)
values (3, 3);
insert into #tempCounts (id, itemId)
values (4, 3);


----------------------------------------------------------





select
    items.category
    ,items.subcategory
    , count(counts.id) as count
from
    #tempItems items
        left join #tempCounts counts on items.id = counts.itemid

group by items.category, items.subcategory
order by items.category, items.subcategory

SELECT Q.Service_Company_Code
     , Q.Mapping
     , COUNT(T.Service_Ticket_Id) AS 'Ticket_Count'
FROM (
    SELECT SC.Service_Company_Id, SC.Service_Company_Code, SSP.Problem_Id, SSPM.SedonaSync_Problem_Sub_Mapping_Id, SSPM.Mapping
    FROM SV_Service_Company SC
    CROSS JOIN KS_SedonaSync_Problem_Sub_Mapping SSPM
    LEFT JOIN KS_SedonaSync_Problem SSP ON SSPM.SedonaSync_Problem_Sub_Mapping_Id = SSP.SedonaSync_Problem_Sub_Mapping_Id
    WHERE SC.Vendor_Id = 1
    AND SC.Inactive = 'N'
    AND SC.Service_Company_Id <> 1
    AND SSPM.Inactive = 'N'
) Q
LEFT JOIN SV_Service_Ticket T ON T.Sub_Problem_Id = Q.Problem_Id AND T.Service_Company_Id = Q.Service_Company_Id AND T.Ticket_Status <> 'CL'
GROUP BY Q.Service_Company_Code, Q.Mapping 
ORDER BY Q.Service_Company_Code, Q.Mapping