Threshold

SELECT * FROM gallery2 WHERE topic_id="1530459" UNION SELECT * FROM gallery2 WHERE topic_id="1258741" UNION SELECT * FROM gallery2 WHERE topic_id="1076774" UNION SELECT * FROM gallery2 WHERE topic_id="1031316" UNION SELECT * FROM gallery2 WHERE topic_id="177958" UNION SELECT * FROM gallery2 WHERE topic_id="978808" UNION SELECT * FROM gallery2 WHERE topic_id="1746976" UNION SELECT * FROM gallery2 WHERE topic_id="1757052" UNION SELECT * FROM gallery2 WHERE topic_id="854066" UNION SELECT * FROM gallery2 WHERE topic_id="472353" UNION SELECT * FROM gallery2 WHERE topic_id="160301" UNION SELECT * FROM gallery2 WHERE topic_id="1395074" UNION SELECT * FROM gallery2 WHERE topic_id="1628355" UNION SELECT * FROM gallery2 WHERE topic_id="315431" UNION SELECT * FROM gallery2 WHERE topic_id="418721" UNION SELECT * FROM gallery2 WHERE topic_id="1155408"