One question that Ansi join convert to (+)

Question

Hi,
Original sql as below:
left join limit_order on limit_order.id = active_request_leg_map.DEAL_ID and limit_order.rita_deal_id = request.rita_deal_id
I want to use （+） instead of Ansi join, how to do it?
Thanks
Edited by: user886998 on 2011-4-4 下午9:01
Edited by: user886998 on 2011-4-4 下午9:02
Edited by: user886998 on 2011-4-4 下午9:05
Edited by: user886998 on 2011-4-4 下午9:06

Answer 1

Hi,
Welcome to the forum!
user886998 wrote:
Original sql as below:
left join limit_order on limit_order.id = active_request_leg_map.DEAL_ID and limit_order.rita_deal_id = request.rita_deal_id
I want to use （+） instead of Ansi join, how to do it?Why? Are you using Oracle 8 (or earlier)? That's the only good reason for using non-ANSI joins, especially for outer joins.
Whenever you post a question, say which version of Oracle you're using.
If you really must do this without ANSI joins, then join active_request_leg_map and request in a sub-query, and then join limit_order to that result set.
SELECT  ...
FROM    (
            SELECT  a.deal_id
            ,       r.rita_deal_id
            FROM    active_request_leg_map  a
            ,       request                 r
            WHERE   ...
        )            sq
,       limit_order  lo
WHERE   lo.id (+)            = sq.deal_id
AND     lo.rita_deal_id (+)  = sq.rita_deal_id
...If you'd care to post a little sample data (CREATE TABLE and INSERT statements for all tables) and the results you want from that data, then I could show you exactly, and test it.