On Thu, 16 Oct 2003, Dejan Milenkovic wrote:
I'm not fammiliar with internal MySQL architecture and exactly how things
work but I was wondering what is the most effcient way of spliting reports
over multiple pages. Is there a preformance difference between these two
codes, specialy if there are some complex conditions and joins that should
be done to get result.
$page=1; // this is set via GET or POST
$items_per_page=10;
$sql=SELECT COUNT(*) FROM table;
$result=mysql_query($sql)
$number_of_items=mysql_numrows($result);
$start=($page-1)*$items_per_page;
$sql=SELECT * FROM table LIMIT $start, $items_per_page;
$result=mysql_query($sql)
while ($row=mysql_fetch_assoc($result)) {
// here goes output
}
The above is better. MySQL doesn't return 4,000 pages to PHP, just the 10
you ask for. Faster, cleaner, better. Select count(*) from table is
super-fast, so almost no overhead there.
$page=1; // this is set via GET or POST
$items_per_page=10;
$sql=SELECT * FROM table;
$result=mysql_query($sql)
$number_of_items=mysql_numrows($result);
$start=($page-1)*$items_per_page;
mysql_data_seek($result, $start);
for ($i=0; $i$items_per_page; $i++) {
$row=mysql_fetch_assoc($result)
// here goes output
}
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Peter Beckman Internet Guy
[EMAIL PROTECTED] http://www.purplecow.com/
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