3

我有以下工作查询，但似乎必须有一种更简单的方法来编写它。我已经尽我所能清理了查询，并将其粘贴在下面，感谢您给我的任何帮助/建议。

样本结果：

UserID  | MemberCount | TotalCheck | TotalCCs
---------------------------------------------- 
123     |  75         |  25        | 0 
456     |  74         |  129       | 156

示例查询：

Select BPE.UserID
    ,ISNULL((Select COUNT(*) 
           From clients 
           where fac_id = BPE.billpay_FacID 
               and clt_web_type = 1 
               and clt_relationship = 0),'0') as MemberCount
    ,(Select SUM(achorder_total) as ACHTotal 
        from ACHOrder 
        where achorder_siteid = BPE.siteID 
                    and ACHOrder_PayDate between @Start and @End 
                    and ACHOrder_Status not in ('Voided','Reversed')) As TotalChecks
    ,(Select SUM(CCorder_total) as CCTotal 
        from CCOrder 
        where CCorder_siteid = BPE.siteID 
                    and CCOrder_PayDate between @Start and @End 
                    and CCOrder_Status not in ('Voided','Reversed')) As TotalCCs
From BillingEnabled BPE
Order By BPE.UserID

有没有更简单的方法来构造这个查询？

4

1 回答 1

2

If I understood correctly, you want to count/sum unrelated rowsets independently? I don't think that you have much choice there.

What I would use is CROSS APPLY (or its sister OUTER APPLY). It changes the syntax a bit, but it probably doesn't change the execution plan much (you should check it, though. I'm just guessing here).

SELECT BPE.UserID, MemberCount.Value, TotalChecks.Value
FROM BillingEnabled BPE
CROSS APPLY (SELECT COUNT(*) as Value 
             FROM clients 
             WHERE fac_id = BPE.billpay_FacID and ...) MemberCount
OUTER APPLY (SELECT SUM(achorder_total) as Value 
             FROM ACHOrder 
             WHERE achorder_siteid = BPE.siteID AND ...) TotalChecks
ORDER BY 1

Maybe the execution plan is different if you do the full computations first then join the results. Not sure if this would be more efficient or worse. If you don't query everything but a small subset of users, this would be very inefficient if you don't restrict the first two queries in some way.

WITH MemberCount AS
(
  SELECT fac_id, COUNT(*) as Value
  FROM clients
  WHERE clt_web_type = 1 AND clt_relationship = 0
  GROUP BY fac_id
),
TotalChecks AS
(
  SELECT achorder_siteid, SUM(achorder_total) as Value
  FROM ACHOrder
  WHERE ACHOrder_PayDate BETWEEN @Start AND @End 
    AND ACHOrder_Status NOT IN ('Voided','Reversed')) 
  GROUP BY achorder_siteid
)
SELECT BPE.UserId, MemberCount.Value, TotalChecks.Value
FROM BPE
LEFT OUTER JOIN MemberCount 
  ON MemberCount.fac_id = BPE.billpay_FacID
LEFT OUTER JOIN TotalChecks
  ON TotalChecks.achorder_siteid = BPE.siteID
ORDER BY 1
于 2013-06-10T23:22:01.727 回答