David Pradier wrote:
> Ok, understood.
> One can access the columns of the main query from the subquery,
> therefore in my own query the column "id_compte" is found,
> therefore there is no error message.
>
> Doesn't this count as a bug ?
Tricky, you could have something like: SELECT a.* FROM a WHERE (a1,a2) IN (SELECT a1,b3 FROM b ...)
If that's legal, then so is your query.
> On Wed, Mar 16, 2005 at 02:24:48PM +0000, Richard Huxton wrote:
>
>>David Pradier wrote:
>>
>>>Actually, the column "id_compte" is the primary key of the table "compte".
>>>The column "id_compte" doesn't exist in the table "operation".
>>>
>>>But i still don't understand why there is no error message, could you
>>>explain a little more ?
>>
>>I think it's intended for use in the WHERE clause:
>> SELECT a.* FROM a WHERE a1 IN (SELECT b3 FROM b WHERE b2=a2)
-- Richard Huxton Archonet Ltd