Question

Currently I’m running a MySQL query like this

$query = "
        SELECT 
        t1.id AS 'post_id',
        t1.post_title AS 'post_title',
        t1.post_status AS 'post_status',
        COUNT( t1.id ) AS 'row_count', //this one is not working
        COUNT( t2.tag_id ) AS 'link_count',
        GROUP_CONCAT( t2.tag_id) AS 'link_id',
        GROUP_CONCAT( t2.url) AS 'url',
        GROUP_CONCAT( t2.title) AS 'title',
        GROUP_CONCAT( t2.active) AS 'active',
        FROM $posts_table AS t1
        JOIN $tags_table AS t2 ON ( t1.id = t2.post_id )
        GROUP BY t1.id
        ORDER BY t1.id DESC
        LIMIT $start_from, $row_to_show;
    ";

Every part of this query is executing well except COUNT( t1.id ) AS 'row_count', line.

I want to count total numbers of rows found in t1 table but when I’m dumping the array

$result = $wpdb->get_results($query);
var_dump($result->row_count);

It is giving me NULL.

If I use it inside a loop

foreach ( $result as $result ){
    echo $result->row_count;
}

Then the value is same as link_count that is declared in the very next line COUNT( t2.link_id ) AS 'link_count', gives the value I want.

Please give me some idea about how I can use pagination (like 10 out of 30 results) on this query.

Answer 1

I tried many but didn’t succeed so I made another separate DB query for just pagination.

$page_query = "
    SELECT p.id 
    FROM 
    $posts_table as p, 
    $tag_table as c
    WHERE p.id=c.post_id
    GROUP BY p.id
";

it gives me the result of total numbers of rows that I can use for pagination.