小编use*_*040的帖子

我的任务是改进我公司的现有代码/查询,

数据库版本

Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi
PL/SQL Release 10.2.0.4.0 - Production
"CORE   10.2.0.4.0  Production"
TNS for IBM/AIX RISC System/6000: Version 10.2.0.4.0 - Productio
NLSRTL Version 10.2.0.4.0 - Production

这就是问题 - 当执行下面的代码时,完成工作所需的时间超过4小时,大约需要7到8个小时.

3小时37分钟内395行数据

  SELECT DISTINCT GROUP_DIST_NUMBER, BEGIN_DATE, PRICE_DROP_DATE
    FROM (SELECT DISTINCT
                 G.GROUP_DIST_NUMBER,
                 TO_DATE (:B2, 'DD-MON-YYYY') BEGIN_DATE,
                 TO_DATE (:B2, 'DD-MON-YYYY') PRICE_DROP_DATE
            FROM POS_DISTI_GROUP G,
                 POS_CUST_XREF M,
                 S_CPT_SEQ_NO C,
                 PP_STD_PRICE P,
                 S_CPT_AUDIT A,
                 RPT_PRODUCT_VALUE_LEVEL L
           WHERE     G.END_DATE > TO_DATE (:B2, 'DD-MON-YYYY')
                 AND G.GROUP_DIST_NUMBER = M.DIST_NUMBER
                 AND M.SG_BILL_TO_CUST_NO = …