public static function remove($report_id)
 {
     $q = new dquery(RUDE_DATABASE_TABLE_CALENDAR_ITEMS);
     $q->where(RUDE_DATABASE_FIELD_REPORT_ID, (int) $report_id);
     $q->query();
     return $q->affected();
 }
 public static function remove($item_id)
 {
     if (static::is_exists($item_id)) {
         $q = new dquery(RUDE_DATABASE_TABLE_EDUCATION_ITEMS_VALUES);
         $q->where('item_id', (int) $item_id);
         $q->query();
         return $q->affected();
     }
     return false;
 }
 public static function remove($id)
 {
     if (static::is_exists($id)) {
         $q = new dquery(RUDE_DATABASE_TABLE_REPORTS_CATEGORIES_ITEMS);
         $q->where(RUDE_DATABASE_FIELD_ID, (int) $id);
         $q->query();
         return $q->affected();
     }
     return false;
 }
 public static function remove($id)
 {
     if (static::is_exists($id)) {
         $q = new dquery(RUDE_DATABASE_TABLE_CALENDAR_LEGEND);
         $q->where(RUDE_DATABASE_FIELD_ID, (int) $id);
         $q->query();
         return $q->affected();
     }
     return false;
 }
 public static function remove($id)
 {
     if (static::is_exists($id)) {
         $q = new dquery(RUDE_DATABASE_TABLE_EDUCATION_ITEMS_PREVIEW);
         $q->where(RUDE_DATABASE_FIELD_ID, (int) $id);
         $q->query();
         return $q->affected();
     }
     return false;
 }