DB2-SQL从子查询记录集中过滤记录

Question

首先，我不太熟悉SQL。

我试图根据子查询的记录来过滤结果：

SELECT DISTCINT 
    t.end_zone, l2.LS_TRIP_NUMBER, l2.LS_DRIVER, 
    l2.LS_POWER_UNIT, l2.LS_ACTUAL_DATE
FROM
    LYNX.LEGSUM l
LEFT OUTER JOIN 
    LYNX.TLORDER t ON l.LS_DLID = t.DETAIL_LINE_ID
INNER JOIN 
    LYNX.LEGSUM l2 ON l2.LS_FROM_ZONE = t.END_ZONE
                   AND l2.LS_DRIVER = l.LS_DRIVER
                   AND l2.LS_POWER_UNIT = l.LS_POWER_UNIT
WHERE
    t.ORIGIN = 'PRO8060'
    AND l.LS_ACTUAL_DATE >= '2017-01-01 00:00:00'
    AND l.LS_ACTUAL_DATE < '2018-01-01 00:00:00'
    AND NOT (t.CURRENT_STATUS = 'CANCEL'
             OR t.CURRENT_STATUS = 'CANCL'
             OR t.CURRENT_STATUS = 'ENTRY')

现在，我要做的是根据以下内容从我的Legsum（LS）表中进行过滤：

-LS.Origin = t.endzone
-LS.Power_unit = l2.power_unit
-LS.Driver = l2.Driver
-LS.actual_date Between l.actual_date and DAY(l.actual_date)+1

当我尝试在子查询的结果中获取所有这些条件时，这就是我所尝试的：

SELECT
    LEGSUM.LS_TRIP_NUMBER, LEGSUM.LS_LEG_DIST, LS_MT_LOADED 
FROM
    LYNX.LEGSUM LEGSUM
LEFT OUTER JOIN 
    LYNX.TLORDER TLORDER ON LEGSUM.LS_DLID = TLORDER.DETAIL_LINE_ID
WHERE
    LEGSUM.LS_ACTUAL_DATE >= '2017-01-01 00:00:00'
    AND LEGSUM.LS_ACTUAL_DATE < '2018-01-01 00:00:00'
    AND NOT (TLORDER.BILL_NUMBER LIKE 'A%'
             OR TLORDER.BILL_NUMBER LIKE 'C%'
             OR TLORDER.BILL_NUMBER LIKE 'L%'
             OR TLORDER.BILL_NUMBER LIKE 'Q%'
             OR TLORDER.BILL_NUMBER LIKE 'MA%')
    AND NOT (TLORDER.CURRENT_STATUS = 'CANCEL'
             OR TLORDER.CURRENT_STATUS = 'CANCL'
             OR TLORDER.CURRENT_STATUS = 'ENTRY')
    AND LEGSUM.LS_FROM_ZONE IN (SELECT DISTINCT t.end_zone, l2.LS_TRIP_NUMBER, l2.LS_DRIVER, l2.LS_POWER_UNIT
                                FROM LYNX.LEGSUM l
                                LEFT OUTER JOIN LYNX.TLORDER t ON l.LS_DLID = t.DETAIL_LINE_ID
                                INNER JOIN LYNX.LEGSUM l2 ON l2.LS_FROM_ZONE = t.END_ZONE
                                                          AND l2.LS_DRIVER = l.LS_DRIVER
                                                          AND l2.LS_POWER_UNIT = l.LS_POWER_UNIT
                                WHERE t.ORIGIN = 'PRO8060'
                                  AND l.LS_ACTUAL_DATE >= '2017-01-01 00:00:00'
                                  AND l.LS_ACTUAL_DATE < '2018-01-01 00:00:00'
                                  AND NOT (t.CURRENT_STATUS = 'CANCEL'
                                           OR t.CURRENT_STATUS = 'CANCL'
                                           OR t.CURRENT_STATUS = 'ENTRY')
                               )

这是第一个条件，而不是其他三个条件

感谢您提供的所有帮助

Answer 1

考虑将子查询列与外部查询列相关联的EXISTS而不是IN 。 请参阅子查询中的最后4个WHERE子句条件，以根据需要进行修改。 这种方法建议在外部查询中使用表别名进行相关。

SELECT
    l.LS_TRIP_NUMBER, l.LS_LEG_DIST, l.LS_MT_LOADED 
FROM
    LYNX.LEGSUM l
LEFT OUTER JOIN 
    LYNX.TLORDER t ON l.LS_DLID = t.DETAIL_LINE_ID
WHERE
    l.LS_ACTUAL_DATE >= '2017-01-01 00:00:00'
    AND l.LS_ACTUAL_DATE < '2018-01-01 00:00:00'
    AND NOT (t.BILL_NUMBER LIKE 'A%' OR t.BILL_NUMBER LIKE 'C%'
             OR t.BILL_NUMBER LIKE 'L%' OR t.BILL_NUMBER LIKE 'Q%'
             OR t.BILL_NUMBER LIKE 'MA%')
    AND NOT (t.CURRENT_STATUS = 'CANCEL'
             OR t.CURRENT_STATUS = 'CANCL'
             OR t.CURRENT_STATUS = 'ENTRY')
    AND EXISTS (SELECT 1
                FROM LYNX.LEGSUM sub_l
                LEFT OUTER JOIN LYNX.TLORDER sub_t ON sub_l.LS_DLID = sub_t.DETAIL_LINE_ID
                INNER JOIN LYNX.LEGSUM sub_l2 ON sub_l2.LS_FROM_ZONE = t.END_ZONE
                      AND sub_l2.LS_DRIVER = sub_l.LS_DRIVER
                      AND sub_l2.LS_POWER_UNIT = sub_l.LS_POWER_UNIT
                WHERE sub_t.ORIGIN = 'PRO8060'
                  AND sub_l.LS_ACTUAL_DATE >= '2017-01-01 00:00:00'
                  AND sub_l.LS_ACTUAL_DATE < '2018-01-01 00:00:00'
                  AND NOT (sub_t.CURRENT_STATUS = 'CANCEL'
                           OR sub_t.CURRENT_STATUS = 'CANCL'
                           OR sub_t.CURRENT_STATUS = 'ENTRY')

                  AND l.LS_FROM_ZONE = sub_t.endzone
                  AND l.LS_POWER_UNIT = sub_l2.LS_POWER_UNIT
                  AND l.LS_DRIVER = sub_l2.LS_DRIVER
                  AND l.LS_ACTUAL_DATE  BETWEEN sub_l.LS_ACTUAL_DATE  
                                            AND (sub_l.LS_ACTUAL_DATE  + 1 DAYS)
               )