Comments on: How to optimize subqueries and joins in MySQL http://www.xaprb.com/blog/2006/04/30/how-to-optimize-subqueries-and-joins-in-mysql/ Stay curious! Fri, 30 Jul 2010 06:32:28 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: admin http://www.xaprb.com/blog/2006/04/30/how-to-optimize-subqueries-and-joins-in-mysql/#comment-18504 admin Thu, 15 Jul 2010 15:56:28 +0000 http://www.xaprb.com/blog/?p=127#comment-18504 I wanted to thank you for your help in suggesting the wrapper subquery trick. I had a query which took forever but now it runs pretty quick. I wanted to thank you for your help in suggesting the wrapper subquery trick. I had a query which took forever but now it runs pretty quick.

]]> By: Michael Mior http://www.xaprb.com/blog/2006/04/30/how-to-optimize-subqueries-and-joins-in-mysql/#comment-18490 Michael Mior Fri, 09 Jul 2010 02:41:40 +0000 http://www.xaprb.com/blog/?p=127#comment-18490 I know this post is ancient now. But I just wanted to thank you for your help in suggesting the wrapper subquery trick. It helped me go from a query which timed out after one hour to one which executes in around 5 seconds. Awesome! I know this post is ancient now. But I just wanted to thank you for your help in suggesting the wrapper subquery trick. It helped me go from a query which timed out after one hour to one which executes in around 5 seconds. Awesome!

]]> By: Grateful ... http://www.xaprb.com/blog/2006/04/30/how-to-optimize-subqueries-and-joins-in-mysql/#comment-18450 Grateful ... Mon, 28 Jun 2010 20:28:39 +0000 http://www.xaprb.com/blog/?p=127#comment-18450 Thanks for posting this. Your simple fix was able to take one of the uglier queries I have ever written from 22+ minutes down to 3.8 seconds. Thanks for posting this. Your simple fix was able to take one of the uglier queries I have ever written from 22+ minutes down to 3.8 seconds.

]]> By: Vector Thorn http://www.xaprb.com/blog/2006/04/30/how-to-optimize-subqueries-and-joins-in-mysql/#comment-18385 Vector Thorn Mon, 07 Jun 2010 23:08:39 +0000 http://www.xaprb.com/blog/?p=127#comment-18385 Hey, thanks for clarifying this. So, if i gather everything correctly, joins are best, derived tables are second best, and subqueries are worst-case scenario? That sounds very reasonable. Thanks for sharing. Hey, thanks for clarifying this. So, if i gather everything correctly, joins are best, derived tables are second best, and subqueries are worst-case scenario? That sounds very reasonable.

Thanks for sharing.

]]> By: Math http://www.xaprb.com/blog/2006/04/30/how-to-optimize-subqueries-and-joins-in-mysql/#comment-17120 Math Fri, 16 Oct 2009 16:17:46 +0000 http://www.xaprb.com/blog/?p=127#comment-17120 Hi, I select the value of a table using type and I also want the mysql query to its next and previous type all this has to written in single query select * from tb1 where type='All calculators',id=(all cal+1) Is there is any option to do all this in one query. Hi,

I select the value of a table using type and I also want the mysql query to its next and previous type all this has to written in single query

select * from tb1 where type=’All calculators’,id=(all cal+1)

Is there is any option to do all this in one query.

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