Cum join? 😋

SELECT * FROM gallery2 WHERE topic_id="870333" UNION SELECT * FROM gallery2 WHERE topic_id="1527450" UNION SELECT * FROM gallery2 WHERE topic_id="109813" UNION SELECT * FROM gallery2 WHERE topic_id="839374" UNION SELECT * FROM gallery2 WHERE topic_id="227637" UNION SELECT * FROM gallery2 WHERE topic_id="917361" UNION SELECT * FROM gallery2 WHERE topic_id="1556451" UNION SELECT * FROM gallery2 WHERE topic_id="1781755" UNION SELECT * FROM gallery2 WHERE topic_id="829205" UNION SELECT * FROM gallery2 WHERE topic_id="1038932" UNION SELECT * FROM gallery2 WHERE topic_id="1156456" UNION SELECT * FROM gallery2 WHERE topic_id="1124842" UNION SELECT * FROM gallery2 WHERE topic_id="1565285" UNION SELECT * FROM gallery2 WHERE topic_id="688764" UNION SELECT * FROM gallery2 WHERE topic_id="1710553" UNION SELECT * FROM gallery2 WHERE topic_id="1257415"