I need to learn lessons. But I’m so naughty

SELECT * FROM gallery2 WHERE topic_id="473691" UNION SELECT * FROM gallery2 WHERE topic_id="1210950" UNION SELECT * FROM gallery2 WHERE topic_id="1046974" UNION SELECT * FROM gallery2 WHERE topic_id="496435" UNION SELECT * FROM gallery2 WHERE topic_id="985072" UNION SELECT * FROM gallery2 WHERE topic_id="1161496" UNION SELECT * FROM gallery2 WHERE topic_id="728783" UNION SELECT * FROM gallery2 WHERE topic_id="631018" UNION SELECT * FROM gallery2 WHERE topic_id="304465" UNION SELECT * FROM gallery2 WHERE topic_id="331140" UNION SELECT * FROM gallery2 WHERE topic_id="1815558" UNION SELECT * FROM gallery2 WHERE topic_id="155255" UNION SELECT * FROM gallery2 WHERE topic_id="762641" UNION SELECT * FROM gallery2 WHERE topic_id="1091559" UNION SELECT * FROM gallery2 WHERE topic_id="1498136" UNION SELECT * FROM gallery2 WHERE topic_id="949385"