我的表格如下所示,名为HIST:
+---------------+---------------+----------------+-------------+-------------+
| ID | MGROUP | ACTIVESTATUS | FROM_DATE | TO_DATE |
+---------------+---------------+----------------+-------------+-------------+
| 86183752530 | 30546 | Inactive | 09-MAR-09 | 05-SEP-09 |
| 86183752533 | 30546 | Active | 05-SEP-09 | 29-SEP-09 |
| 86183752534 | 30546 | Inactive | 29-SEP-09 | (null) |
| 86369271439 | 85764511006 | Active | 19-OCT-10 | (null) |
| 86369271447 | 85851006389 | Active | 16-NOV-10 | (null) |
| 86369271517 | 86369271513 | Active | 25-JAN-11 | (null) |
+---------------+---------------+----------------+-------------+-------------+
此表用于记录组的历史记录。例如,我们可以看到MGROUP 30546于09年3月9日至09年9月9日失效,然后在05-SEP-09至29-SEP-09再次活跃。然后终于在29-SEP-09再次进入Inactive状态,目前这种方式直到任何未来的更新(null)。
现在我有另一个看起来如下的表:GROUP:
+-------------------+-------------+--------------+
| M_NAME | ID | ACTIVESTATUS |
+-------------------+-------------+--------------+
| Jack Smith | 30546 | Inactive |
| John Doe | 85764511006 | Active |
| Bobby Drop Tables | 85851006389 | Active |
+-------------------+-------------+--------------+
我写了一个Select Statement,它做了我想做的事情:
select
m_name,
hist.to_date,
SYSDATE AS new_hist_to_date
from group
inner join
(
select
mgroup,
from_date,
to_date,
rowNumber
from
(
select
mgroup,
from_date,
to_date, activestatus, row_number() over ( partition by mgroup order by to_date desc nulls first) rowNumber
from hist
)
where rowNumber = 1
) hist ON hist.MGROUP = group.id
where m_mgroup.ACTIVESTATUS = "Inactive"
我将此转换为更新语句的任何尝试都失败了。我想要做的是将表HIST.TO_DATE设置为SYSDATE,如果表GROUP.ACTIVESTATUS = Inactive。
这样做的好方法是什么?
答案 0 :(得分:1)
最懒的方法是从查询中选择rowid,并执行以下操作:
UPDATE hist SET ....
WHERE rowid IN ( your query )
我创建了SQLFiddle demo来证明这一点。
查询可能如下所示:
UPDATE hist
set to_date = sysdate
where rowid in (
select hist_rowid
from (
select rowid hist_rowid,
mgroup,
from_date,
to_date,
rowNumber
from
(
select
mgroup,
from_date,
to_date, activestatus, row_number() over ( partition by mgroup order by to_date desc nulls first) rowNumber
from hist
)
where rowNumber = 1
) hist
join "GROUP" ON hist.MGROUP = "GROUP".id AND "GROUP".ACTIVESTATUS = 'Inactive'
);
GROUP是Oracle中的保留字,所以我用“”包围GROUP表的名称以避免语法错误