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Re: Optimizing left outer join query
Posted by: KimSeong Loh ()
Date: September 25, 2006 09:55PM

That explain the ALL, but I would have expect an eq_ref instead of ref in the 2nd table, since mfg_no is a unique key.

And, you should have used p.pid is null instead of p.mfg_no is null since mfg_no column allows null.

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Subject Views Written By Posted
Optimizing left outer join query 12428 Muhammad Imran Khalid 09/24/2006 11:40PM
Re: Optimizing left outer join query 4142 Toa Sty 09/25/2006 03:00AM
Re: Optimizing left outer join query 3575 Muhammad Imran Khalid 09/25/2006 04:54AM
Re: Optimizing left outer join query 3710 Toa Sty 09/25/2006 08:09AM
Re: Optimizing left outer join query 3115 KimSeong Loh 09/25/2006 09:55PM
Re: Optimizing left outer join query 3066 Toa Sty 09/26/2006 03:35AM
Re: Optimizing left outer join query 2711 Muhammad Imran Khalid 09/26/2006 03:46AM
Re: Optimizing left outer join query 4290 Toa Sty 09/26/2006 04:06AM
Re: Optimizing left outer join query 2566 KimSeong Loh 09/26/2006 06:31PM


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