[SQL]Decifrare la query

[digital00]

[SQL]Decifrare la query

Vi chiedo una semplice cosa: sapete dirmi cosa fa la query all'interno di questa condizione if:

  if ( (!isset($new_products_category_id)) || ($new_products_category_id == '0') ) {
    $new_products_query = tep_db_query("select p.products_id, p.products_image, p.products_tax_class_id, if(s.status, s.specials_new_products_price, p.products_price) as products_price from " . TABLE_PRODUCTS . " p left join " . TABLE_SPECIALS . " s on p.products_id = s.products_id where products_status = '1' order by p.products_date_added desc limit " . 1);
  } else {
    $new_products_query = tep_db_query("select distinct p.products_id, p.products_image, p.products_tax_class_id, if(s.status, s.specials_new_products_price, p.products_price) as products_price from " . TABLE_PRODUCTS . " p left join " . TABLE_SPECIALS . " s on p.products_id = s.products_id, " . TABLE_PRODUCTS_TO_CATEGORIES . " p2c, " . TABLE_CATEGORIES . " c where p.products_id = p2c.products_id and p2c.categories_id = c.categories_id and c.parent_id = '" . (int)$new_products_category_id . "' and p.products_status = '1' order by p.products_date_added desc limit " . 1);
  }

Vorrei soltanto sapere qual'è l'obiettivo della query e se sapete elencarmi gli specifici campi del db che dovrebbe richiamare.