Oracle SQL - 任何人都可以提高效率吗？

时间：2014-04-23 08:15:14

标签： sql performance oracle query-optimization

这有点味道 - 这是一个从水晶报告中调用的查询，该报告使用分成两个纸箱的纸箱编号进行搜索并返回纸箱编号，数量，从原始数量中删除的数量，用户和拖车号码，如果它已经加载到一个。

查询的第一部分效果很好，遗憾的是所有数据都会在30天后归档，并且存档量很大！添加归档部分后，此查询可能需要30到45分钟才能运行，这太长了。任何人都可以帮我优化这个查询，以便它可以更快地运行吗？

非常感谢，7岁。

SELECT *
FROM
  (SELECT menu_optn_name,
          tran_nbr,
          seq_nbr,
          cntr_nbr,
          ch.total_qty ,
          ptt.create_date_time,
          um.user_name,
          ch.trlr_nbr,

     (SELECT sum(ref_field_2)
      FROM prod_trkg_tran
      WHERE menu_optn_name = 'RF Split/Comb {Carton}'
        AND cntr_nbr = '0030651942') AS Total
   FROM prod_trkg_tran ptt
   INNER JOIN user_master um ON um.emplye_id = ptt.user_id
   LEFT OUTER JOIN carton_hdr ch ON ch.carton_nbr = ptt.cntr_nbr
   WHERE menu_optn_name = 'RF Split/Comb {Carton}'
     AND ptt.cntr_nbr = '0030651942'
   GROUP BY menu_optn_name,
            tran_nbr,
            seq_nbr,
            cntr_nbr,
            ch.total_qty,
            ptt.create_date_time,
            um.user_name,
            ch.trlr_nbr
   UNION SELECT menu_optn_name,
                tran_nbr,
                seq_nbr,
                cntr_nbr,
                ch.total_qty,
                ptt.create_date_time,
                um.user_name,
                ch.trlr_nbr,

     (SELECT sum(ref_field_2)
      FROM prod_trkg_tran
      WHERE menu_optn_name = 'RF Split/Comb {Carton}'
        AND cntr_nbr NOT IN
          (SELECT cntr_nbr
           FROM prod_trkg_tran ptt
           LEFT OUTER JOIN carton_hdr ch ON ch.carton_nbr = ptt.cntr_nbr
           WHERE menu_optn_name = 'RF Split/Comb {Carton}'
             AND ptt.cntr_nbr = '0030651942')
        AND tran_nbr IN
          (SELECT tran_nbr
           FROM prod_trkg_tran ptt
           LEFT OUTER JOIN carton_hdr ch ON ch.carton_nbr = ptt.cntr_nbr
           WHERE menu_optn_name = 'RF Split/Comb {Carton}'
             AND ptt.cntr_nbr = '0030651942')) AS Total
   FROM prod_trkg_tran ptt
   INNER JOIN user_master um ON um.emplye_id = ptt.user_id
   LEFT OUTER JOIN carton_hdr ch ON ch.carton_nbr = ptt.cntr_nbr
   WHERE cntr_nbr NOT IN
       (SELECT cntr_nbr
        FROM prod_trkg_tran ptt
        LEFT OUTER JOIN carton_hdr ch ON ch.carton_nbr = ptt.cntr_nbr
        WHERE menu_optn_name = 'RF Split/Comb {Carton}'
          AND ptt.cntr_nbr = '0030651942')
     AND tran_nbr IN
       (SELECT tran_nbr
        FROM prod_trkg_tran ptt
        LEFT OUTER JOIN carton_hdr ch ON ch.carton_nbr = ptt.cntr_nbr
        WHERE menu_optn_name = 'RF Split/Comb {Carton}'
          AND ptt.cntr_nbr = '0030651942')
   GROUP BY menu_optn_name,
            tran_nbr,
            seq_nbr,
            cntr_nbr,
            ch.total_qty,
            ptt.create_date_time,
            um.user_name,
            ch.trlr_nbr)
UNION
SELECT *
FROM
  (SELECT menu_optn_name,
          tran_nbr,
          seq_nbr,
          cntr_nbr,
          ch.total_qty,
          ptt.create_date_time,
          um.user_name,
          ch.trlr_nbr,

     (SELECT sum(ref_field_2)
      FROM wm_archive.prod_trkg_tran@awm.corp.*******.com
      WHERE menu_optn_name = 'RF Split/Comb {Carton}'
        AND cntr_nbr = '0030651942') AS Total
   FROM wm_archive.prod_trkg_tran@awm.corp.*******.com ptt
   INNER JOIN user_master um ON um.emplye_id = ptt.user_id
   LEFT OUTER JOIN carton_hdr ch ON ch.carton_nbr = ptt.cntr_nbr
   WHERE menu_optn_name = 'RF Split/Comb {Carton}'
     AND ptt.cntr_nbr = '0030651942'
   GROUP BY menu_optn_name,
            tran_nbr,
            seq_nbr,
            cntr_nbr,
            ch.total_qty,
            ptt.create_date_time,
            um.user_name,
            ch.trlr_nbr
   UNION SELECT menu_optn_name,
                tran_nbr,
                seq_nbr,
                cntr_nbr,
                ch.total_qty,
                ptt.create_date_time,
                um.user_name,
                ch.trlr_nbr,

     (SELECT sum(ref_field_2)
      FROM wm_archive.prod_trkg_tran@awm.corp.*******.com
      WHERE menu_optn_name = 'RF Split/Comb {Carton}'
        AND cntr_nbr NOT IN
          (SELECT cntr_nbr
           FROM wm_archive.prod_trkg_tran@awm.corp.*******.com ptt
           LEFT OUTER JOIN wm_archive.carton_hdr@awm.corp.*******.com ch ON ch.carton_nbr = ptt.cntr_nbr
           WHERE menu_optn_name = 'RF Split/Comb {Carton}'
             AND ptt.cntr_nbr = '0030651942')
        AND tran_nbr IN
          (SELECT tran_nbr
           FROM wm_archive.prod_trkg_tran@awm.corp.*******.com ptt
           LEFT OUTER JOIN wm_archive.carton_hdr@awm.corp.*******.com ch ON ch.carton_nbr = ptt.cntr_nbr
           WHERE menu_optn_name = 'RF Split/Comb {Carton}'
             AND ptt.cntr_nbr = '0030651942')) AS Total
   FROM wm_archive.prod_trkg_tran@awm.corp.*******.com ptt
   INNER JOIN user_master um ON um.emplye_id = ptt.user_id
   LEFT OUTER JOIN wm_archive.carton_hdr@awm.corp.*******.com ch ON ch.carton_nbr = ptt.cntr_nbr
   WHERE cntr_nbr NOT IN
       (SELECT cntr_nbr
        FROM wm_archive.prod_trkg_tran@awm.corp.*******.com ptt
        LEFT OUTER JOIN wm_archive.carton_hdr@awm.corp.*******.com ch ON ch.carton_nbr = ptt.cntr_nbr
        WHERE menu_optn_name = 'RF Split/Comb {Carton}'
          AND ptt.cntr_nbr = '0030651942')
     AND tran_nbr IN
       (SELECT tran_nbr
        FROM wm_archive.prod_trkg_tran@awm.corp.*******.com ptt
        LEFT OUTER JOIN wm_archive.carton_hdr@awm.corp.*******.com ch ON ch.carton_nbr = ptt.cntr_nbr
        WHERE menu_optn_name = 'RF Split/Comb {Carton}'
          AND ptt.cntr_nbr = '0030651942')
   GROUP BY menu_optn_name,
            tran_nbr,
            seq_nbr,
            cntr_nbr,
            ch.total_qty,
            ptt.create_date_time,
            um.user_name,
            ch.trlr_nbr)
WHERE rownum <=2;

1 个答案:

答案 0 :(得分：0)

我看到这个查询有两种可能的优化。

首先是：

SELECT key, (SELECT SUM(value) FROM table WHERE condition) AS Total
FROM table WHERE condition
GROUP BY key

在功能上等同于：

SELECT key, SUM(value)
FROM table WHERE condition
GROUP BY key

......但可能效率低得多。

第二个是：

SELECT x,y,z FROM table WHERE condition_1 GROUP BY x,y
UNION
SELECT x,y,z FROM table WHERE condition_2 GROUP BY x,y

在功能上等同于：

SELECT x,y,z FROM table WHERE condition_1 OR condition_2 GROUP BY x,y

也就是说，如果condition_1和condition_2只引用出现在GROUP BY子句中的列，就像你的情况一样。顺序可能存在一些差异，但如果需要，可以使用显式ORDER BY子句来解决这些差异。

也就是说，消除4个子选择和2个联合似乎是可能的。考虑到WHERE过滤器的所有列都位于prod_trkg_tran表中，您还可以删除一些LEFT JOIN。所以它看起来像这样：

   select * from (
         select menu_optn_name, tran_nbr, seq_nbr, cntr_nbr, ch.total_qty, ptt.create_date_time, um.user_name, ch.trlr_nbr, sum(ref_field_2) as Total
         from            prod_trkg_tran ptt
         inner join      user_master    um  on um.emplye_id = ptt.user_id
         left outer join carton_hdr     ch  on ch.carton_nbr = ptt.cntr_nbr
         where (menu_optn_name = 'RF Split/Comb {Carton}' and ptt.cntr_nbr = '0030651942') or (
            cntr_nbr not in (
               select cntr_nbr
               from prod_trkg_tran
               where menu_optn_name = 'RF Split/Comb {Carton}' and cntr_nbr = '0030651942'
            ) and
            tran_nbr in (
               select tran_nbr
               from prod_trkg_tran 
               where menu_optn_name = 'RF Split/Comb {Carton}' and cntr_nbr = '0030651942'
            )
         )
         group by menu_optn_name, tran_nbr, seq_nbr, cntr_nbr, ch.total_qty, ptt.create_date_time, um.user_name, ch.trlr_nbr
   )
union
   select * from (
         select menu_optn_name, tran_nbr, seq_nbr, cntr_nbr, ch.total_qty, ptt.create_date_time, um.user_name, ch.trlr_nbr, sum(ref_field_2) as Total
         from            wm_archive.prod_trkg_tran@awm.corp.*******.com ptt
         inner join      user_master                                    um  on um.emplye_id = ptt.user_id
         left outer join carton_hdr                                     ch  on ch.carton_nbr = ptt.cntr_nbr
         where (menu_optn_name = 'RF Split/Comb {Carton}' and ptt.cntr_nbr = '0030651942') or (
            cntr_nbr not in (
               select cntr_nbr
               from wm_archive.prod_trkg_tran@awm.corp.*******.com
               where menu_optn_name = 'RF Split/Comb {Carton}' and cntr_nbr = '0030651942'
            ) and
            tran_nbr in (
               select tran_nbr
               from wm_archive.prod_trkg_tran@awm.corp.*******.com ptt
               where menu_optn_name = 'RF Split/Comb {Carton}' and cntr_nbr = '0030651942'
            )
         )
         group by menu_optn_name, tran_nbr, seq_nbr, cntr_nbr, ch.total_qty, ptt.create_date_time, um.user_name, ch.trlr_nbr
   )
where rownum <=2;

还有第三个优化。 user_master上的INNER JOIN可以从内部选择移出到外部联合。但我怀疑这次加入的成本是多少。

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