IN/NOT IN Parsing

From: Preston <dontwantany_at_nowhere.invalid>
Date: 24 Oct 2008 10:00:37 GMT
Message-ID: <>

I'd never noticed until today that Oracle doesn't check if columns used in an in/not in clause are valid. Is this common knowledge that I've somehow missed out on?

Strikes me as being very dangerous as you could typo a column name & never know about it - at least not until your data was already screwed up.

create table t1 (id1 number);

create table t2 (id1 number, id2 number);

insert into t1 values(1);

insert into t2 values(1,1);
insert into t2 values(1,2);


select * from t2
where id2 in (select id2 from t1);

Received on Fri Oct 24 2008 - 05:00:37 CDT

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