使SQL查詢更快更好

我有，我需要從表中收集的銷售統計數據，有很多數據彙總的情況。該表有幾百萬個條目，數據庫本身大約22Gb。大量的數據可以玩！使SQL查詢更快更好

我有這個工作的查詢，但我覺得我應該這樣做更好 - 它也很慢。我使用PHP與CentOS的7 SQLSRV擴展連接到MSSQL數據庫（ERP系統）

。在此查詢

我的PHP變量設置如下：

$customer = '12345'; 
$year = '2016'; 
$compared_year = '2015';

所以，你可能已經猜到了，我收集的銷售統計對於給定的客戶2016年的每個月和

SELECT 
ProdTr.CustNo AS customernummer, 

(SELECT SUM(DAm) AS 'Sum' FROM ProdTr WHERE AcYrPr = '" . $year . "01' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS sum_period_1, 
(SELECT SUM(DAm) AS 'Sum' FROM ProdTr WHERE AcYrPr = '" . $year . "02' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS sum_period_2, 
(SELECT SUM(DAm) AS 'Sum' FROM ProdTr WHERE AcYrPr = '" . $year . "03' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS sum_period_3, 
(SELECT SUM(DAm) AS 'Sum' FROM ProdTr WHERE AcYrPr = '" . $year . "04' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS sum_period_4, 
(SELECT SUM(DAm) AS 'Sum' FROM ProdTr WHERE AcYrPr = '" . $year . "05' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS sum_period_5, 
(SELECT SUM(DAm) AS 'Sum' FROM ProdTr WHERE AcYrPr = '" . $year . "06' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS sum_period_6, 
(SELECT SUM(DAm) AS 'Sum' FROM ProdTr WHERE AcYrPr = '" . $year . "07' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS sum_period_7, 
(SELECT SUM(DAm) AS 'Sum' FROM ProdTr WHERE AcYrPr = '" . $year . "08' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS sum_period_8, 
(SELECT SUM(DAm) AS 'Sum' FROM ProdTr WHERE AcYrPr = '" . $year . "09' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS sum_period_9, 
(SELECT SUM(DAm) AS 'Sum' FROM ProdTr WHERE AcYrPr = '" . $year . "10' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS sum_period_10, 
(SELECT SUM(DAm) AS 'Sum' FROM ProdTr WHERE AcYrPr = '" . $year . "11' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS sum_period_11, 
(SELECT SUM(DAm) AS 'Sum' FROM ProdTr WHERE AcYrPr = '" . $year . "12' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS sum_period_12, 

(SELECT (((SUM(DAm)-(SUM(StcCst)*-1))*100)/NULLIF(SUM(DAm),0)) AS 'DG' FROM ProdTr WHERE AcYrPr = '" . $year . "01' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS dg_period_1, 
(SELECT (((SUM(DAm)-(SUM(StcCst)*-1))*100)/NULLIF(SUM(DAm),0)) AS 'DG' FROM ProdTr WHERE AcYrPr = '" . $year . "02' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS dg_period_2, 
(SELECT (((SUM(DAm)-(SUM(StcCst)*-1))*100)/NULLIF(SUM(DAm),0)) AS 'DG' FROM ProdTr WHERE AcYrPr = '" . $year . "03' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS dg_period_3, 
(SELECT (((SUM(DAm)-(SUM(StcCst)*-1))*100)/NULLIF(SUM(DAm),0)) AS 'DG' FROM ProdTr WHERE AcYrPr = '" . $year . "04' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS dg_period_4, 
(SELECT (((SUM(DAm)-(SUM(StcCst)*-1))*100)/NULLIF(SUM(DAm),0)) AS 'DG' FROM ProdTr WHERE AcYrPr = '" . $year . "05' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS dg_period_5, 
(SELECT (((SUM(DAm)-(SUM(StcCst)*-1))*100)/NULLIF(SUM(DAm),0)) AS 'DG' FROM ProdTr WHERE AcYrPr = '" . $year . "06' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS dg_period_6, 
(SELECT (((SUM(DAm)-(SUM(StcCst)*-1))*100)/NULLIF(SUM(DAm),0)) AS 'DG' FROM ProdTr WHERE AcYrPr = '" . $year . "07' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS dg_period_7, 
(SELECT (((SUM(DAm)-(SUM(StcCst)*-1))*100)/NULLIF(SUM(DAm),0)) AS 'DG' FROM ProdTr WHERE AcYrPr = '" . $year . "08' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS dg_period_8, 
(SELECT (((SUM(DAm)-(SUM(StcCst)*-1))*100)/NULLIF(SUM(DAm),0)) AS 'DG' FROM ProdTr WHERE AcYrPr = '" . $year . "09' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS dg_period_9, 
(SELECT (((SUM(DAm)-(SUM(StcCst)*-1))*100)/NULLIF(SUM(DAm),0)) AS 'DG' FROM ProdTr WHERE AcYrPr = '" . $year . "10' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS dg_period_10, 
(SELECT (((SUM(DAm)-(SUM(StcCst)*-1))*100)/NULLIF(SUM(DAm),0)) AS 'DG' FROM ProdTr WHERE AcYrPr = '" . $year . "10' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS dg_period_11, 
(SELECT (((SUM(DAm)-(SUM(StcCst)*-1))*100)/NULLIF(SUM(DAm),0)) AS 'DG' FROM ProdTr WHERE AcYrPr = '" . $year . "11' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS dg_period_12, 

(SELECT SUM(DAm) AS 'Sum' FROM ProdTr WHERE AcYrPr = '" . $compared_year . "01' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS compared_sum_period_1, 
(SELECT SUM(DAm) AS 'Sum' FROM ProdTr WHERE AcYrPr = '" . $compared_year . "02' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS compared_sum_period_2, 
(SELECT SUM(DAm) AS 'Sum' FROM ProdTr WHERE AcYrPr = '" . $compared_year . "03' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS compared_sum_period_3, 
(SELECT SUM(DAm) AS 'Sum' FROM ProdTr WHERE AcYrPr = '" . $compared_year . "04' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS compared_sum_period_4, 
(SELECT SUM(DAm) AS 'Sum' FROM ProdTr WHERE AcYrPr = '" . $compared_year . "05' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS compared_sum_period_5, 
(SELECT SUM(DAm) AS 'Sum' FROM ProdTr WHERE AcYrPr = '" . $compared_year . "06' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS compared_sum_period_6, 
(SELECT SUM(DAm) AS 'Sum' FROM ProdTr WHERE AcYrPr = '" . $compared_year . "07' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS compared_sum_period_7, 
(SELECT SUM(DAm) AS 'Sum' FROM ProdTr WHERE AcYrPr = '" . $compared_year . "08' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS compared_sum_period_8, 
(SELECT SUM(DAm) AS 'Sum' FROM ProdTr WHERE AcYrPr = '" . $compared_year . "09' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS compared_sum_period_9, 
(SELECT SUM(DAm) AS 'Sum' FROM ProdTr WHERE AcYrPr = '" . $compared_year . "10' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS compared_sum_period_10, 
(SELECT SUM(DAm) AS 'Sum' FROM ProdTr WHERE AcYrPr = '" . $compared_year . "11' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS compared_sum_period_11, 
(SELECT SUM(DAm) AS 'Sum' FROM ProdTr WHERE AcYrPr = '" . $compared_year . "12' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS compared_sum_period_12, 

(SELECT (((SUM(DAm)-(SUM(StcCst)*-1))*100)/NULLIF(SUM(DAm),0)) AS 'DG' FROM ProdTr WHERE AcYrPr = '" . $compared_year . "01' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS compared_dg_period_1, 
(SELECT (((SUM(DAm)-(SUM(StcCst)*-1))*100)/NULLIF(SUM(DAm),0)) AS 'DG' FROM ProdTr WHERE AcYrPr = '" . $compared_year . "02' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS compared_dg_period_2, 
(SELECT (((SUM(DAm)-(SUM(StcCst)*-1))*100)/NULLIF(SUM(DAm),0)) AS 'DG' FROM ProdTr WHERE AcYrPr = '" . $compared_year . "03' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS compared_dg_period_3, 
(SELECT (((SUM(DAm)-(SUM(StcCst)*-1))*100)/NULLIF(SUM(DAm),0)) AS 'DG' FROM ProdTr WHERE AcYrPr = '" . $compared_year . "04' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS compared_dg_period_4, 
(SELECT (((SUM(DAm)-(SUM(StcCst)*-1))*100)/NULLIF(SUM(DAm),0)) AS 'DG' FROM ProdTr WHERE AcYrPr = '" . $compared_year . "05' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS compared_dg_period_5, 
(SELECT (((SUM(DAm)-(SUM(StcCst)*-1))*100)/NULLIF(SUM(DAm),0)) AS 'DG' FROM ProdTr WHERE AcYrPr = '" . $compared_year . "06' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS compared_dg_period_6, 
(SELECT (((SUM(DAm)-(SUM(StcCst)*-1))*100)/NULLIF(SUM(DAm),0)) AS 'DG' FROM ProdTr WHERE AcYrPr = '" . $compared_year . "07' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS compared_dg_period_7, 
(SELECT (((SUM(DAm)-(SUM(StcCst)*-1))*100)/NULLIF(SUM(DAm),0)) AS 'DG' FROM ProdTr WHERE AcYrPr = '" . $compared_year . "08' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS compared_dg_period_8, 
(SELECT (((SUM(DAm)-(SUM(StcCst)*-1))*100)/NULLIF(SUM(DAm),0)) AS 'DG' FROM ProdTr WHERE AcYrPr = '" . $compared_year . "09' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS compared_dg_period_9, 
(SELECT (((SUM(DAm)-(SUM(StcCst)*-1))*100)/NULLIF(SUM(DAm),0)) AS 'DG' FROM ProdTr WHERE AcYrPr = '" . $compared_year . "10' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS compared_dg_period_10, 
(SELECT (((SUM(DAm)-(SUM(StcCst)*-1))*100)/NULLIF(SUM(DAm),0)) AS 'DG' FROM ProdTr WHERE AcYrPr = '" . $compared_year . "11' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS compared_dg_period_11, 
(SELECT (((SUM(DAm)-(SUM(StcCst)*-1))*100)/NULLIF(SUM(DAm),0)) AS 'DG' FROM ProdTr WHERE AcYrPr = '" . $compared_year . "12' AND ProdTr.TrTp = 1 AND ProdTr.CustNo = '" . $customer . "') AS compared_dg_period_12 

FROM ProdTr 

WHERE AcYrPr LIKE 201612 
AND ProdTr.TrTp = 1 
AND ProdTr.CustNo = '" . $customer . "' 

GROUP BY ProdTr.CustNo, ProdTr.TrTp, ProdTr.AcYrPr

請注意，該查詢效果很好，給我我期望的結果 - 但它對於有很多訂單/交易的客戶來說太慢了。

就如何加快這任何指針？

非常感謝您的時間！

來源

2017-03-26 Magnus Alexander

你看着GROUP BY？即使你不能在一個查詢中運行整個事情，你也可以在四個地方完成，並將結果放入單個關聯數組中。 – Nick

您的查詢應該使用有條件聚集：

SELECT ProdTr.CustNo AS customernummer, 
     SUM(CASE WHEN AcYrPr = '" . $year . "01' THEN DAm ELSE 0 END) as sum_period_1, 
     SUM(CASE WHEN AcYrPr = '" . $year . "02' THEN DAm ELSE 0 END) as sum_period_2, 
     . . . 
WHERE AcYrPr LIKE 201612 AND ProdTr.TrTp = 1 AND 
     ProdTr.CustNo = '" . $customer . "' 
GROUP BY ProdTr.CustNo, ProdTr.TrTp;

子查詢不應該是必要的。

來源

2017-03-26 21:53:18

謝謝！（SUM（StcCst）* - - 1））* 100）/ NULLIF從該組刪除，ProdTr.AcYrPr當BY子句我可以問你怎麼把（SELECT（（（SUM（DAM）這種運作良好（SUM（DAM），0））AS 'DG' FROM ProdTr WHERE AcYrPr =「」。$一年。「01並ProdTr.TrTp = 1 AND ProdTr.CustNo =「」。$客戶。「'）AS dg_period_1， CASE語法中？非常感謝！ –

@MagnusAlexander。。。我錯過了那個在'group by'中。 –

不用擔心:)非常感謝！ –

使SQL查詢更快更好

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