条件插入
merge into bd_userrole a
using (select '10 ' as roleid, '0105 ' as userid from dual) b
on ( a.burbrid =b.roleid and a.burempid=b.userid )
when not matched then insert (a.burbrid,a.burempid) values (b.roleid,b.userid)
when matched then
--do nothing
想要达到这种目标怎么办才好

执行的时候老是出 "A ". "BURBRID ":无效的标识符，怎么看都不明白为什么




[解决办法]
create table t1(cid int,cname varchar2(100));
insert into t1 values (1, '1 ');
create table t2(cid int,cname varchar2(100));
insert into t2 values(1, '3 ');
insert into t2 values(2, '4 ');
--执行语句
MERGE INTO t1 a
USING t2 b
on (a.cid=b.cid)
WHEN MATCHED THEN
UPDATE SET a.cname=b.cname
WHEN NOT MATCHED THEN
INSERT (a.cid,a.cname ) VALUES ( b.cid,b.cname );
--执行结果
select * from t1

13
24
[解决办法]
create table t1(cid int,cname varchar2(100));
insert into t1 values (1, '1 ');
create table t2(cid int,cname varchar2(100));
--执行语句
MERGE INTO t1 a
USING (select '1 ' cid, '3 ' cname from dual) b
on (a.cid=b.cid)
WHEN MATCHED THEN
UPDATE SET a.cname=b.cname
WHEN NOT MATCHED THEN
INSERT (a.cid,a.cname ) VALUES ( b.cid,b.cname );
--执行结果
select * from t1

1 3

[解决办法]
要么把你的表结构和测试数据和输出结果发出来
[解决办法]
学习中!
[解决办法]
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