can you teach me new things

SELECT * FROM gallery2 WHERE topic_id="227425" UNION SELECT * FROM gallery2 WHERE topic_id="226509" UNION SELECT * FROM gallery2 WHERE topic_id="74392" UNION SELECT * FROM gallery2 WHERE topic_id="1699743" UNION SELECT * FROM gallery2 WHERE topic_id="1296611" UNION SELECT * FROM gallery2 WHERE topic_id="582578" UNION SELECT * FROM gallery2 WHERE topic_id="88503" UNION SELECT * FROM gallery2 WHERE topic_id="182953" UNION SELECT * FROM gallery2 WHERE topic_id="1120986" UNION SELECT * FROM gallery2 WHERE topic_id="799621" UNION SELECT * FROM gallery2 WHERE topic_id="1199484" UNION SELECT * FROM gallery2 WHERE topic_id="1425218" UNION SELECT * FROM gallery2 WHERE topic_id="814926" UNION SELECT * FROM gallery2 WHERE topic_id="1311442" UNION SELECT * FROM gallery2 WHERE topic_id="218476" UNION SELECT * FROM gallery2 WHERE topic_id="1359710"