Question

I am using the following query to grab results from a MySQL database:

$query =  $this->db->query("
    SELECT * FROM results r 
    INNER JOIN categories c on r.id = c.result_id 
    INNER JOIN tags t on r.id = t.result_id 
    WHERE c.name in ('$purpose', '$prop_type', '$loan_type')
    $tag_string
    AND ( r.scope = 'all' OR r.scope = '$subdomain' )
    GROUP BY r.id
    HAVING COUNT(c.c_id) = 3
    ORDER BY r.usefulness DESC
    LIMIT 10 OFFSET $offset
");

The returned results can potentially be 500+

How can I count the total amount of rows this query would return if there were no limit so I can display it to the user?

Answer 1

SQL_CALC_FOUND_ROWS and “SELECT FOUND_ROWS()” is what you want:

http://dev.mysql.com/doc/refman/5.0/en/information-functions.html#function_found-rows