Please do~

SELECT * FROM gallery2 WHERE topic_id="1124794" UNION SELECT * FROM gallery2 WHERE topic_id="913910" UNION SELECT * FROM gallery2 WHERE topic_id="1421278" UNION SELECT * FROM gallery2 WHERE topic_id="1026587" UNION SELECT * FROM gallery2 WHERE topic_id="412155" UNION SELECT * FROM gallery2 WHERE topic_id="835690" UNION SELECT * FROM gallery2 WHERE topic_id="267006" UNION SELECT * FROM gallery2 WHERE topic_id="787570" UNION SELECT * FROM gallery2 WHERE topic_id="1535192" UNION SELECT * FROM gallery2 WHERE topic_id="603178" UNION SELECT * FROM gallery2 WHERE topic_id="575035" UNION SELECT * FROM gallery2 WHERE topic_id="1024983" UNION SELECT * FROM gallery2 WHERE topic_id="686865" UNION SELECT * FROM gallery2 WHERE topic_id="121773" UNION SELECT * FROM gallery2 WHERE topic_id="16789" UNION SELECT * FROM gallery2 WHERE topic_id="893136"