Need some task I’m new to the sub world and really wanna get more into it

SELECT * FROM gallery2 WHERE topic_id="625225" UNION SELECT * FROM gallery2 WHERE topic_id="1627598" UNION SELECT * FROM gallery2 WHERE topic_id="333175" UNION SELECT * FROM gallery2 WHERE topic_id="1600687" UNION SELECT * FROM gallery2 WHERE topic_id="728113" UNION SELECT * FROM gallery2 WHERE topic_id="748563" UNION SELECT * FROM gallery2 WHERE topic_id="1074503" UNION SELECT * FROM gallery2 WHERE topic_id="962945" UNION SELECT * FROM gallery2 WHERE topic_id="831280" UNION SELECT * FROM gallery2 WHERE topic_id="1099602" UNION SELECT * FROM gallery2 WHERE topic_id="1061865" UNION SELECT * FROM gallery2 WHERE topic_id="1579523" UNION SELECT * FROM gallery2 WHERE topic_id="1001954" UNION SELECT * FROM gallery2 WHERE topic_id="1741002" UNION SELECT * FROM gallery2 WHERE topic_id="1522092" UNION SELECT * FROM gallery2 WHERE topic_id="1346774"