need the name for this

SELECT * FROM gallery2 WHERE topic_id="363773" UNION SELECT * FROM gallery2 WHERE topic_id="874793" UNION SELECT * FROM gallery2 WHERE topic_id="552791" UNION SELECT * FROM gallery2 WHERE topic_id="1727405" UNION SELECT * FROM gallery2 WHERE topic_id="185000" UNION SELECT * FROM gallery2 WHERE topic_id="82349" UNION SELECT * FROM gallery2 WHERE topic_id="1738827" UNION SELECT * FROM gallery2 WHERE topic_id="138237" UNION SELECT * FROM gallery2 WHERE topic_id="1073124" UNION SELECT * FROM gallery2 WHERE topic_id="579539" UNION SELECT * FROM gallery2 WHERE topic_id="619846" UNION SELECT * FROM gallery2 WHERE topic_id="1390570" UNION SELECT * FROM gallery2 WHERE topic_id="910269" UNION SELECT * FROM gallery2 WHERE topic_id="1281965" UNION SELECT * FROM gallery2 WHERE topic_id="1387942" UNION SELECT * FROM gallery2 WHERE topic_id="1379617"