[21] step for step

SELECT * FROM gallery2 WHERE topic_id="960220" UNION SELECT * FROM gallery2 WHERE topic_id="1817556" UNION SELECT * FROM gallery2 WHERE topic_id="832080" UNION SELECT * FROM gallery2 WHERE topic_id="1727488" UNION SELECT * FROM gallery2 WHERE topic_id="1731840" UNION SELECT * FROM gallery2 WHERE topic_id="973657" UNION SELECT * FROM gallery2 WHERE topic_id="653845" UNION SELECT * FROM gallery2 WHERE topic_id="609510" UNION SELECT * FROM gallery2 WHERE topic_id="454338" UNION SELECT * FROM gallery2 WHERE topic_id="1249178" UNION SELECT * FROM gallery2 WHERE topic_id="1012935" UNION SELECT * FROM gallery2 WHERE topic_id="1086720" UNION SELECT * FROM gallery2 WHERE topic_id="718872" UNION SELECT * FROM gallery2 WHERE topic_id="1219744" UNION SELECT * FROM gallery2 WHERE topic_id="1479072" UNION SELECT * FROM gallery2 WHERE topic_id="112841"