note 97861 deleted from function.mysql-data-seek by danbrown
| From: | danbrown@php.net | Date: | Wed, 12 May 2010 15:53:15 +0000 |
| Subject: | note 97861 deleted from function.mysql-data-seek by danbrown | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-169188@lists.php.net to get a copy of this message | ||
Note Submitter: srynningb at yh dot com
----
Here's a handy way to sequentially number the rows of any query result starting with 0, so in
code you can easily save a current row number if you need to jump back to it later with
mysql_data_seek().
SELECT <field1>,<field2>,etc,@rownum:=@rownum+1 as rownumber FROM <table1> JOIN
<table2> JOIN etc JOIN (SELECT @rownum:=-1) as start WHERE <condition1> AND
<condition2> AND etc
This will add a column called "rownumber" to the result which counts up starting with 0 on
the first row. Note: the "start" alias is required because it's a derived table even
though nothing refers to it.