标签:style blog class code c java
oracle使用LEFT JOIN关联产生的问题在查询结果中使用CASE WHEN 无法判断
查询方式一:
1 SELECT 2 CASE WHEN (SELECT CAST(SUM(CASE 3 WHEN (ALLOCABLE_PRIME_CURRENCY_VALUE IS NULL AND STATE_IND = 1) THEN 4 NVL(PRIME_CURRENCY_VALUE, 0) 5 ELSE 6 NVL(ALLOCABLE_PRIME_CURRENCY_VALUE, 0) END) AS NUMBER(18,6)) AS ALLOCABLE_PRIME_CURRENCY_VALUE 7 FROM RP_LEDGER_ITEM R 8 WHERE R.SOURCE_ID = RP_CASH_MOVEMENT.CASH_MOVEMENT_ID 9 AND SOURCE_TYPE = ‘CASH‘) = 0 THEN 0 ELSE 1 END, 10 (SELECT SUM(CASE 11 WHEN (ALLOCABLE_PRIME_CURRENCY_VALUE IS NULL AND STATE_IND = 1) THEN 12 NVL(PRIME_CURRENCY_VALUE, 0) 13 ELSE 14 NVL(ALLOCABLE_PRIME_CURRENCY_VALUE, 0) END) AS ALLOCABLE_PRIME_CURRENCY_VALUE 15 FROM RP_LEDGER_ITEM R 16 WHERE R.SOURCE_ID = RP_CASH_MOVEMENT.CASH_MOVEMENT_ID 17 AND SOURCE_TYPE = ‘CASH‘), 18 RP_LEDGER_ITEM.LEDGER_ITEM_ID 19 FROM RP_CASH_MOVEMENT 20 LEFT JOIN RP_LEDGER_ITEM 21 ON RP_LEDGER_ITEM.CASH_MOVEMENT_ID = RP_CASH_MOVEMENT.CASH_MOVEMENT_ID 22 AND RP_LEDGER_ITEM.CASH_MOVEMENT_ID IS NOT NULL 23 WHERE NVL(RP_CASH_MOVEMENT.IS_RESERVE_FUND, ‘0‘) = ‘0‘ 24 AND 1 = 1 25 AND RP_CASH_MOVEMENT.RP_ID = ‘R‘ 26 AND RP_CASH_MOVEMENT.INPUT_DATE >= 27 TO_DATE(‘2014/2/1 0:00:00‘, ‘YYYY-MM-DD HH24:MI:SS‘) 28 AND (RP_CASH_MOVEMENT.OFFICE_ID = ‘0B4B12XOG33MO‘)
查询结果如下:
查询方式二:
SELECT CASE WHEN (SELECT CAST(SUM(CASE WHEN (ALLOCABLE_PRIME_CURRENCY_VALUE IS NULL AND STATE_IND = 1) THEN NVL(PRIME_CURRENCY_VALUE, 0) ELSE NVL(ALLOCABLE_PRIME_CURRENCY_VALUE, 0) END) AS NUMBER(18,6)) AS ALLOCABLE_PRIME_CURRENCY_VALUE FROM RP_LEDGER_ITEM R WHERE R.SOURCE_ID = RP_CASH_MOVEMENT.CASH_MOVEMENT_ID AND SOURCE_TYPE = ‘CASH‘) = 0 THEN 0 ELSE 1 END, (SELECT SUM(CASE WHEN (ALLOCABLE_PRIME_CURRENCY_VALUE IS NULL AND STATE_IND = 1) THEN NVL(PRIME_CURRENCY_VALUE, 0) ELSE NVL(ALLOCABLE_PRIME_CURRENCY_VALUE, 0) END) AS ALLOCABLE_PRIME_CURRENCY_VALUE FROM RP_LEDGER_ITEM R WHERE R.SOURCE_ID = RP_CASH_MOVEMENT.CASH_MOVEMENT_ID AND SOURCE_TYPE = ‘CASH‘), ‘‘ LEDGER_ITEM_ID FROM RP_CASH_MOVEMENT LEFT JOIN RP_LEDGER_ITEM ON RP_LEDGER_ITEM.CASH_MOVEMENT_ID = RP_CASH_MOVEMENT.CASH_MOVEMENT_ID AND RP_LEDGER_ITEM.CASH_MOVEMENT_ID IS NOT NULL WHERE NVL(RP_CASH_MOVEMENT.IS_RESERVE_FUND, ‘0‘) = ‘0‘ AND 1 = 1 AND RP_CASH_MOVEMENT.RP_ID = ‘R‘ AND RP_CASH_MOVEMENT.INPUT_DATE >= TO_DATE(‘2014/2/1 0:00:00‘, ‘YYYY-MM-DD HH24:MI:SS‘) AND (RP_CASH_MOVEMENT.OFFICE_ID = ‘0B4B12XOG33MO‘)
查询结果如图:
2条sql语句最大的区别在于
有些可能表达不清楚,
主要原因我也不知道,如果谁有兴趣可以回复我!
oracle使用LEFT JOIN关联产生的问题在查询结果中使用CASE WHEN 无法判断,布布扣,bubuko.com
oracle使用LEFT JOIN关联产生的问题在查询结果中使用CASE WHEN 无法判断
标签:style blog class code c java
原文地址:http://www.cnblogs.com/xzxy/p/3732402.html