使SQL查询更快更好

时间：2017-03-26 21:44:51

标签： php sql sql-server

我有一个案例需要从包含大量汇总数据的表中收集销售统计信息。该表有几百万个条目，数据库本身大约是22Gb。有大量数据可供使用！

我有这个工作查询，但我觉得我应该做得更好 - 而且它也很慢。

我在CentOS 7上使用带有sqlsrv扩展名的PHP连接到MSSQL数据库（ERP系统）。

此查询中的我的php变量设置如下：

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

因此，正如您可能已经猜到的那样，我正在为2016年和2015年的每个月收集特定客户的销售统计数据。

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

请注意，查询效果很好，可以得到我期望的结果 - 但对于有很多订单/交易的客户来说，这个结果太慢了。

有关如何加快速度的任何指示？

非常感谢你的时间！

1 个答案:

答案 0 :(得分：3)

您的查询应该使用条件聚合：

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;

不需要子查询。

相关问题
最新问题