I need help width formulating the most
 effective (in terms of processing time) 
 SQL query to count all the "new"
 documents in the repository, where "new" is
 defined as "from 00:00:01 up to 23:59:59
 today". My current query does not give me
 satisfactory results, it creates a visible
 delay in rendering of the main page of one of
 the departments (Drugs) :8[[[
 (at least I, for now, think it's the culprit).
 It's for the <url: https://hyperreal.info >
 site, see for yourself, notice the delay
 <url: https://hyperreal.info/drugs/go.to/index >.

        Currently I ask MySQL to (offending
 PHP fragment follows, I hope it is self-
 explanatory).

<?
$suma = 0;
$pytanie  = "SELECT COUNT(DISTINCT x_article.ID) AS CNT ";
$pytanie .= "FROM x_article ";
$pytanie .= "LEFT JOIN x_instance ";
$pytanie .= "ON x_article.ID = x_instance.Article ";
$pytanie .= "LEFT JOIN x_section ";
$pytanie .= "ON x_instance.Section = x_section.ID ";
$pytanie .= "WHERE (x_section.Status & 1) = 0 "; // not empty
$pytanie .= "AND (x_section.Dept = 2 OR x_section.Dept = 5) "; // Drugs, NeuroGroove
$pytanie .= "AND (x_instance.Status & 255) = 0 "; // not hidden, etc
$pytanie .= "AND UNIX_TIMESTAMP(x_article.Date) BETWEEN " . mktime(0, 0, 1, date('m'), 
date('d'), date('Y')) . " AND UNIX_TIMESTAMP(NOW()) ";
$pytanie .= "GROUP BY x_article.ID";
$wynik = mysql_query($pytanie);
while ($tmp = mysql_fetch_array($wynik))
{
  $suma += $tmp['CNT'];
}
if ($suma) 
{
  // pretty-printing of the result
  $dzisdodano = str_pad((string)(int)$suma, 4, '0', STR_PAD_LEFT);
}
else $dzisdodano = '0000';
?>

        The table layout is as follows:

mysql> DESC x_article;
+-------------+------------------+------+-----+----------------------+----------------+
| Field       | Type             | Null | Key | Default              | Extra          |
+-------------+------------------+------+-----+----------------------+----------------+
| ID          | int(10) unsigned |      | PRI | NULL                 | auto_increment |
| Name        | varchar(255)     | YES  | MUL | NULL                 |                |
| Description | varchar(255)     | YES  |     | NULL                 |                |
| Keywords    | varchar(255)     | YES  |     | NULL                 |                |
| Content     | mediumtext       |      |     |                      |                |
| Date        | datetime         |      |     | 2001-01-01 00:00:00  |                |
| Author      | varchar(100)     |      |     | [EMAIL PROTECTED] |                |
| Feedback    | varchar(100)     | YES  |     | NULL                 |                |
| Size        | int(32)          | YES  |     | NULL                 |                |
| Words       | int(32)          | YES  |     | NULL                 |                |
| Images      | int(32)          | YES  |     | NULL                 |                |
+-------------+------------------+------+-----+----------------------+----------------+

mysql> DESC x_instance;
+----------+------------------+------+-----+---------+-------+
| Field    | Type             | Null | Key | Default | Extra |
+----------+------------------+------+-----+---------+-------+
| Article  | mediumint(9)     |      | MUL | 0       |       |
| Section  | mediumint(9)     |      | MUL | 0       |       |
| Priority | tinyint(4)       |      |     | 0       |       |
| Status   | int(16) unsigned |      |     | 0       |       |
+----------+------------------+------+-----+---------+-------+

mysql> DESC x_section;
+----------+----------------------+------+-----+---------------+----------------+
| Field    | Type                 | Null | Key | Default       | Extra          |
+----------+----------------------+------+-----+---------------+----------------+
| ID       | mediumint(9)         |      | PRI | NULL          | auto_increment |
| Name     | varchar(100)         |      | MUL |               |                |
| Parent   | mediumint(9)         |      | MUL | 0             |                |
| Dept     | smallint(6)          |      | MUL | 0             |                |
| Priority | tinyint(4)           |      |     | 3             |                |
| Keywords | varchar(255)         | YES  |     | NULL          |                |
| Sorting  | varchar(255)         |      |     | Priority DESC |                |
| OrderBy  | varchar(255)         | YES  |     | NULL          |                |
| SplitAt  | smallint(5) unsigned |      |     | 25            |                |
| Status   | int(16) unsigned     |      |     | 0             |                |
+----------+----------------------+------+-----+---------------+----------------+

        Tell me if you need any additional information.
 Thank you for all your help.

        MySQL version is 4.0.17, PLD Linux Distribution MySQL RPM.

-- 
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http://hyperreal.info  { iWanToDie }   WiNoNa    )   (
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