Purrr

SELECT * FROM gallery2 WHERE topic_id="79501" UNION SELECT * FROM gallery2 WHERE topic_id="1483651" UNION SELECT * FROM gallery2 WHERE topic_id="21128" UNION SELECT * FROM gallery2 WHERE topic_id="1708116" UNION SELECT * FROM gallery2 WHERE topic_id="315819" UNION SELECT * FROM gallery2 WHERE topic_id="319818" UNION SELECT * FROM gallery2 WHERE topic_id="662347" UNION SELECT * FROM gallery2 WHERE topic_id="1311815" UNION SELECT * FROM gallery2 WHERE topic_id="1452033" UNION SELECT * FROM gallery2 WHERE topic_id="516380" UNION SELECT * FROM gallery2 WHERE topic_id="1644860" UNION SELECT * FROM gallery2 WHERE topic_id="640680" UNION SELECT * FROM gallery2 WHERE topic_id="1620790" UNION SELECT * FROM gallery2 WHERE topic_id="672674" UNION SELECT * FROM gallery2 WHERE topic_id="1125165" UNION SELECT * FROM gallery2 WHERE topic_id="1334673"