DELETE FROM `player_depotitems`, `player_items`, `tile_items` WHERE `itemtype` IN ("X", "Y", "Z");
DELETE FROM `player_depotitems` WHERE `itemtype` IN ("X", "Y", "Z");
DELETE FROM `player_items` WHERE `itemtype` IN ("X", "Y", "Z");
DELETE FROM `tile_items` WHERE `itemtype` IN ("X", "Y", "Z");