php - insert result set to different table in Webmasters and Developers http://www.dslreports.com/forum/r21502284 en Sat, 05 Dec 2009 21:30:15 EDT Sat, 05 Dec 2009 21:30:15 EDT Re: php - insert result set to different table http://www.dslreports.com/forum/remark,21508486 yock : I should note too that the MySQL information in this post is for MySQL 5.1. If you're using a 4.x or 6.0 MySQL server, you may need to check on the variable names.]]> http://www.dslreports.com/forum/remark,21508486 Mon, 01 Dec 2008 10:57:20 EDT Re: php - insert result set to different table http://www.dslreports.com/forum/remark,21508450 yock : MySQL supports bulk inserts by simply passing multiple data sets to the VALUES directive, like so:

You'll need to pay attention to the value of one of two PHP configuration variables too. The variable 'upload_max_size' governs how much data PHP can send directly to a host, while 'post_max_size' governs how much data PHP will allow you to send via HTTP $_POST. If you're using HTTP to send this you'll want the latter, if you're connecting directly to the MySQL server then you want the fomer.

MySQL also has limits on how much data it can receive. If your inserts are failing and PHP isn't kicking back any errors, try increasing MySQL's 'max_allowed_packet'. You can do this via command line by issuing the command:

mysql --max_allowed_packet=24M

Where "24M" is the size in megabytes of the desired value.

One final note. Though MyISAM doesn't support foreign keys, it does support unique indexes. I'm not entirely sure this will help with MyISAM (it's listed as a performance consideration for InnoDB with bulk inserts) but disabling unique checks should speed you up too if you already know that the data folows your uniqueness rules.

To disable that, login to mysql in the command line and issue the following command:

SET unique_checks=0;

I hope this helps you get started.
]]> http://www.dslreports.com/forum/remark,21508450 Mon, 01 Dec 2008 10:51:36 EDT Re: php - insert result set to different table http://www.dslreports.com/forum/remark,21508322 Dersgniw : MyISAM ]]> http://www.dslreports.com/forum/remark,21508322 Mon, 01 Dec 2008 10:27:29 EDT Re: php - insert result set to different table http://www.dslreports.com/forum/remark,21508199 yock : MyISAM or InnoDB?]]> http://www.dslreports.com/forum/remark,21508199 Mon, 01 Dec 2008 10:02:02 EDT Re: php - insert result set to different table http://www.dslreports.com/forum/remark,21508168 Dersgniw :
said by GILXA1226 See Profile :

What are you using for a database engine?
MySql
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I Smell Cures! -- Our Hope]]> http://www.dslreports.com/forum/remark,21508168 Mon, 01 Dec 2008 09:56:55 EDT Re: php - insert result set to different table http://www.dslreports.com/forum/remark,21502706 GILXA1226 : What are you using for a database engine?]]> http://www.dslreports.com/forum/remark,21502706 Sat, 29 Nov 2008 22:43:59 EDT php - insert result set to different table http://www.dslreports.com/forum/remark,21502284 Dersgniw : I have 2 tables, in 2 databases.

I want to select data from table AA (on DB 1), then insert that to a temporary table B (on DB 2). Since they are in different DB's, is there an easy way to do this? I'm talking 10,000-20,000 rows so I'm just looking for some efficiency.
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I Smell Cures! -- Our Hope]]> http://www.dslreports.com/forum/remark,21502284 Sat, 29 Nov 2008 20:38:38 EDT