SELECT *, f.fid AS fid FROM pre_forum_forum f LEFT JOIN pre_forum_forumfield ff USING (fid)
错误如下:
#1143 - SELECT command denied to user ''@'' for column 'fid' in table 'f'
把USING(fid)改为 On f.fid=ff.fid 却又正常
USING难道还需要特殊权限吗?咋整?