表结构如下
+ --------------- + ---------- + ------------------- + ------------- + --------- + -------- + ---------------- --------- + ---------------- + ---------------- + ------ ----------------- + ---------------------- + --------- ------------ + ------------------- + -------------- +
| REDEMPTION_ID | CCID | MEMBERSHIP_NUMBER | POINTS_TYPE |伙伴 |计划| REDEMPTION_ORDER_STATUS | MEMBER_SEGMENT | PARTNER_POINTS | MEMBERSHIP_FIRST_NAME | MEMBERSHIP_LAST_NAME | REDEMPTION_DATE | OUTBOUND_FILENAME | PRODUCT_TYPE |
+ --------------- + ---------- + -------- ----------- ------------- + + --------- + -------- + ----- -------------------- + ---------------- + ------------ ---- + ----------------------- + --------------------- - + --------------------- + ------------------- + ------ -------- +
| 1003740 | 21212103 | 1231237 | BASE | QANTAS |签证|订购| LEGACY | 5000.000000 | e |名称| 2017-10-23 10:26:51 | NABQF05P.012 |消费者|
| 1003741 | 21212103 | 1231238 |奖金| QANTAS |签证|订购| LEGACY | 2500.000000 | e |名称
| 2017-10-23 10:26:51 | NABQF05P.012 |消费者|
我想根据Membership_Number和POINTS_TYPE列对上述行进行分组，结果行应该是一行。
我使用以下查询：
select * from ((
select * from NAB_REDEMPTION_DETAILS
where PARTNER='QANTAS' and REDEMPTION_ORDER_STATUS IN ('PLACED','RESEND') and POINTS_TYPE = 'BASE' group by MEMBERSHIP_NUMBER) a
left OUTER JOIN (
select * from NAB_REDEMPTION_DETAILS
where PARTNER='QANTAS' and REDEMPTION_ORDER_STATUS IN ('PLACED','RESEND') and POINTS_TYPE = 'BONUS' group by MEMBERSHIP_NUMBER) b on a.MEMBERSHIP_NUMBER=b.MEMBERSHIP_NUMBER) union (
select * from (
select * from NAB_REDEMPTION_DETAILS
where PARTNER='QANTAS' and REDEMPTION_ORDER_STATUS IN ('PLACED','RESEND') and POINTS_TYPE = 'BASE' group by MEMBERSHIP_NUMBER) c right OUTER JOIN (
select * from NAB_REDEMPTION_DETAILS
where PARTNER='QANTAS' and REDEMPTION_ORDER_STATUS IN ('PLACED','RESEND') and POINTS_TYPE = 'BONUS' group by MEMBERSHIP_NUMBER) d on c.MEMBERSHIP_NUMBER=d.MEMBERSHIP_NUMBER)
执行查询时，我得到上述异常
答案 0 :(得分：0)
我明白了。因为我在同一个表中使用连接而Redemption_id是一个主键，所以导致异常。我使用group_concat而不是join，它解决了我的问题。
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