Random took time SQL running

Question

Hello i have a problem

$sql = 'SELECT u.*, s.*
        FROM ' . SESSIONS_TABLE . ' s, ' . USERS_TABLE . " u
        WHERE s.session_id = '" . $db->sql_escape($this->session_id) . "'
          AND u.user_id = s.session_user_id";
      $result = $db->sql_query($sql);
      $this->data = $db->sql_fetchrow($result);

some time took time is 0.0003 and some time is 7.123 !!!

why ? where is my wrong?

question from:https://stackoverflow.com/questions/65908165/random-took-time-sql-running

Answer 1

Waitting for answers