Pulling out is 100% effective

SELECT * FROM gallery2 WHERE topic_id="1788887" UNION SELECT * FROM gallery2 WHERE topic_id="798221" UNION SELECT * FROM gallery2 WHERE topic_id="1577449" UNION SELECT * FROM gallery2 WHERE topic_id="1572208" UNION SELECT * FROM gallery2 WHERE topic_id="5441" UNION SELECT * FROM gallery2 WHERE topic_id="72248" UNION SELECT * FROM gallery2 WHERE topic_id="930051" UNION SELECT * FROM gallery2 WHERE topic_id="113751" UNION SELECT * FROM gallery2 WHERE topic_id="460281" UNION SELECT * FROM gallery2 WHERE topic_id="756942" UNION SELECT * FROM gallery2 WHERE topic_id="962801" UNION SELECT * FROM gallery2 WHERE topic_id="1178419" UNION SELECT * FROM gallery2 WHERE topic_id="1282791" UNION SELECT * FROM gallery2 WHERE topic_id="1798738" UNION SELECT * FROM gallery2 WHERE topic_id="1144621" UNION SELECT * FROM gallery2 WHERE topic_id="1755728"