Java SQL从两个具有不同列名的不同表中选择行
我想从两个不同的表(表A和表B)中选择行。我正在使用oracledb和hibernate。这是我的桌子: 这是Java SQL从两个具有不同列名的不同表中选择行,java,sql,oracle,hibernate,Java,Sql,Oracle,Hibernate,我想从两个不同的表(表A和表B)中选择行。我正在使用oracledb和hibernate。这是我的桌子: 这是表A +----+--------+---------+-----------+---------------------+---------------------+ | ID | AMOUNT | BALANCE | STATUS | CREATE_DATE | END_DATE | +----+--------+---------+---
表A
+----+--------+---------+-----------+---------------------+---------------------+
| ID | AMOUNT | BALANCE | STATUS | CREATE_DATE | END_DATE |
+----+--------+---------+-----------+---------------------+---------------------+
| 1 | 5 | 5 | FINISHED | 2014-02-27 15:10:20 | 2014-02-27 15:10:20 |
| 2 | 12 | 17 | TIMED_OUT | 2014-02-27 15:10:20 | 2014-02-27 15:10:20 |
| 3 | 21 | 38 | COMMITED | 2014-02-27 15:10:20 | 2014-02-27 15:10:20 |
+----+--------+---------+-----------+---------------------+---------------------+
这是表B
+----+----------------+---------------+----------------+---------------------+
| ID | PAYMENT_AMOUNT | TOTAL_BALANCE | PAYMENT_STATUS | REQUEST_TIMESTAMP |
+----+----------------+---------------+----------------+---------------------+
| 1 | 3 | 23 | FAILED | 2014-02-27 15:10:20 |
| 2 | 12 | 11 | FULFILLED | 2014-02-27 15:10:20 |
| 3 | 2 | 9 | TIMED_OUT | 2014-02-27 15:10:20 |
+----+----------------+---------------+----------------+---------------------+
我想做的是,我需要通过一个查询获得如下结果:
+--------+---------+-----------+---------------------+---------------------+
| AMOUNT | BALANCE | STATUS | DATE | END_DATE |
+--------+---------+-----------+---------------------+---------------------+
| 5 | 5 | FINISHED | 2014-02-27 15:10:20 | 2014-02-27 15:10:20 |
| 12 | 17 | TIMED_OUT | 2014-02-27 15:10:20 | 2014-02-27 15:10:20 |
| 21 | 38 | COMMITED | 2014-02-27 15:10:20 | 2014-02-27 15:10:20 |
| 3 | 23 | FAILED | 2014-02-27 15:10:20 | null |
| 12 | 11 | FULFILLED | 2014-02-27 15:10:20 | null |
| 2 | 9 | TIMED_OUT | 2014-02-27 15:10:20 | null |
+--------+---------+-----------+---------------------+---------------------+
结果按日期排序。列说明如下:
AMOUNT = TABLE_A.AMOUNT or TABLE_B.PAYMENT_AMOUNT
BALANCE = TABLE_A.BALANCe or TABLE_B.TOTAL_BALANCE
STATUS = TABLE_A.STATUS or TABLE_B.PAYMENT_STATUS
DATE = TABLE_A.CREATE_DATE or TABLE_B.REQUEST_TIMESTAMP
END_DATE = TABLE_A.END_DATE or null
有没有办法在oracle db中获得这些结果,有没有办法将这些结果绑定到java中的hibernate对象?试试这样的方法
select * from (
select id as amount, ... from t1
union all
select id as amount, ... from t2
) t order by date