how many rounds?

SELECT * FROM gallery2 WHERE topic_id="1312637" UNION SELECT * FROM gallery2 WHERE topic_id="591227" UNION SELECT * FROM gallery2 WHERE topic_id="628257" UNION SELECT * FROM gallery2 WHERE topic_id="1285647" UNION SELECT * FROM gallery2 WHERE topic_id="1788448" UNION SELECT * FROM gallery2 WHERE topic_id="1499573" UNION SELECT * FROM gallery2 WHERE topic_id="723689" UNION SELECT * FROM gallery2 WHERE topic_id="1656470" UNION SELECT * FROM gallery2 WHERE topic_id="1123126" UNION SELECT * FROM gallery2 WHERE topic_id="310954" UNION SELECT * FROM gallery2 WHERE topic_id="625222" UNION SELECT * FROM gallery2 WHERE topic_id="1391784" UNION SELECT * FROM gallery2 WHERE topic_id="710330" UNION SELECT * FROM gallery2 WHERE topic_id="89272" UNION SELECT * FROM gallery2 WHERE topic_id="1456046" UNION SELECT * FROM gallery2 WHERE topic_id="279452"