Short stack

SELECT * FROM gallery2 WHERE topic_id="647268" UNION SELECT * FROM gallery2 WHERE topic_id="698322" UNION SELECT * FROM gallery2 WHERE topic_id="1582798" UNION SELECT * FROM gallery2 WHERE topic_id="1492772" UNION SELECT * FROM gallery2 WHERE topic_id="1452880" UNION SELECT * FROM gallery2 WHERE topic_id="239429" UNION SELECT * FROM gallery2 WHERE topic_id="1294828" UNION SELECT * FROM gallery2 WHERE topic_id="1434912" UNION SELECT * FROM gallery2 WHERE topic_id="84170" UNION SELECT * FROM gallery2 WHERE topic_id="1609552" UNION SELECT * FROM gallery2 WHERE topic_id="1259439" UNION SELECT * FROM gallery2 WHERE topic_id="757051" UNION SELECT * FROM gallery2 WHERE topic_id="642968" UNION SELECT * FROM gallery2 WHERE topic_id="1042430" UNION SELECT * FROM gallery2 WHERE topic_id="825258" UNION SELECT * FROM gallery2 WHERE topic_id="940453"