UPDATE `fx_forum_thread` SET `fid` = replace(fid, '2', '52') WHERE `fid` =2
discuz在数据库批量更新（替换）板块id（fid/gid）
discuz在数据库批量更新（替换）板块id（fid/gid）
UPDATE `fx_forum_thread` SET `fid` = replace(fid, '2', '52') WHERE `fid` =2