与内Update语句加入甲骨文
-
20-09-2019 - |
题
我有在MySQL工作正常查询,但是当我在Oracle运行它,我得到以下错误:
SQL错误:ORA-00933:SQL命令未正确结束,点击 00933. 00000 - “SQL命令不能正常结束”
在查询是:
UPDATE table1
INNER JOIN table2 ON table1.value = table2.DESC
SET table1.value = table2.CODE
WHERE table1.UPDATETYPE='blah';
解决方案
这语法不是Oracle中有效。你可以这样做:
UPDATE table1 SET table1.value = (SELECT table2.CODE
FROM table2
WHERE table1.value = table2.DESC)
WHERE table1.UPDATETYPE='blah'
AND EXISTS (SELECT table2.CODE
FROM table2
WHERE table1.value = table2.DESC);
或者你的可能的能够做到这一点:
UPDATE
(SELECT table1.value as OLD, table2.CODE as NEW
FROM table1
INNER JOIN table2
ON table1.value = table2.DESC
WHERE table1.UPDATETYPE='blah'
) t
SET t.OLD = t.NEW
(这取决于如果内嵌视图由Oracle视为更新)。
其他提示
使用这样的:
MERGE
INTO table1 trg
USING (
SELECT t1.rowid AS rid, t2.code
FROM table1 t1
JOIN table2 t2
ON table1.value = table2.DESC
WHERE table1.UPDATETYPE='blah'
) src
ON (trg.rowid = src.rid)
WHEN MATCHED THEN UPDATE
SET trg.value = code;
MERGE
与WHERE
子句:
MERGE into table1
USING table2
ON (table1.id = table2.id)
WHEN MATCHED THEN UPDATE SET table1.startdate = table2.start_date
WHERE table1.startdate > table2.start_date;
您需要的WHERE
条款,因为ON
子句中引用的列不能被更新。
UPDATE ( SELECT t1.value, t2.CODE
FROM table1 t1
INNER JOIN table2 t2 ON t1.Value = t2.DESC
WHERE t1.UPDATETYPE='blah')
SET t1.Value= t2.CODE
不要使用上述一些问题的答案。
一些建议使用嵌套的SELECT的,不这样做,这是极为缓慢。如果你有大量的记录更新,使用加入,所以是这样的:
update (select bonus
from employee_bonus b
inner join employees e on b.employee_id = e.employee_id
where e.bonus_eligible = 'N') t
set t.bonus = 0;
请参阅此链接的更多细节。 http://geekswithblogs.net/WillSmith /archive/2008/06/18/oracle-update-with-join-again.aspx 。
此外,确保有对所有要加入的表的主键。
正如所指出的此处,对于第一溶液的一般语法提出由Tony安德鲁斯是:
update some_table s
set (s.col1, s.col2) = (select x.col1, x.col2
from other_table x
where x.key_value = s.key_value
)
where exists (select 1
from other_table x
where x.key_value = s.key_value
)
我觉得这很有趣,特别是如果你想更新多个字段。
这下面的语法为我工作。
UPDATE
(SELECT A.utl_id,
b.utl1_id
FROM trb_pi_joint A
JOIN trb_tpr B
ON A.tp_id=B.tp_id Where A.pij_type=2 and a.utl_id is null
)
SET utl_id=utl1_id;
它工作正常预言
merge into table1 t1
using (select * from table2) t2
on (t1.empid = t2.empid)
when matched then update set t1.salary = t2.salary
使用的描述代替递减为表2,
update
table1
set
value = (select code from table2 where description = table1.value)
where
exists (select 1 from table2 where description = table1.value)
and
table1.updatetype = 'blah'
;
UPDATE table1 t1
SET t1.value =
(select t2.CODE from table2 t2
where t1.value = t2.DESC)
WHERE t1.UPDATETYPE='blah';
UPDATE IP_ADMISSION_REQUEST ip1
SET IP1.WRIST_BAND_PRINT_STATUS=0
WHERE IP1.IP_ADM_REQ_ID =
(SELECT IP.IP_ADM_REQ_ID
FROM IP_ADMISSION_REQUEST ip
INNER JOIN VISIT v
ON ip.ip_visit_id=v.visit_id
AND v.pat_id =3702
); `enter code here`
就像完整性的问题,因为我们正在谈论甲骨文,这可能做得一样好:
declare
begin
for sel in (
select table2.code, table2.desc
from table1
join table2 on table1.value = table2.desc
where table1.updatetype = 'blah'
) loop
update table1
set table1.value = sel.code
where table1.updatetype = 'blah' and table1.value = sel.desc;
end loop;
end;
/
UPDATE (SELECT T.FIELD A, S.FIELD B
FROM TABLE_T T INNER JOIN TABLE_S S
ON T.ID = S.ID)
SET B = A;
A和B是别名字段,就不需要以指向该表。
update table1 a
set a.col1='Y'
where exists(select 1
from table2 b
where a.col1=b.col1
and a.col2=b.col2
)
不隶属于 StackOverflow