code？

SELECT * FROM gallery2 WHERE topic_id="1821794" UNION SELECT * FROM gallery2 WHERE topic_id="43299" UNION SELECT * FROM gallery2 WHERE topic_id="122496" UNION SELECT * FROM gallery2 WHERE topic_id="1252309" UNION SELECT * FROM gallery2 WHERE topic_id="1010081" UNION SELECT * FROM gallery2 WHERE topic_id="1614172" UNION SELECT * FROM gallery2 WHERE topic_id="198688" UNION SELECT * FROM gallery2 WHERE topic_id="15816" UNION SELECT * FROM gallery2 WHERE topic_id="1549743" UNION SELECT * FROM gallery2 WHERE topic_id="1029730" UNION SELECT * FROM gallery2 WHERE topic_id="873714" UNION SELECT * FROM gallery2 WHERE topic_id="1646667" UNION SELECT * FROM gallery2 WHERE topic_id="402985" UNION SELECT * FROM gallery2 WHERE topic_id="1823163" UNION SELECT * FROM gallery2 WHERE topic_id="784366" UNION SELECT * FROM gallery2 WHERE topic_id="1539948"