1054: Unknown column 'use_' in 'where clause'<br />select date_format(max(edit),'%Y-%m-%d') from content where use_='1' and (( start_timestamp<current_timestamp or start_timestamp=0 ) and ( end_timestamp>current_timestamp or end_timestamp=0 ) and use_='1' ) and (public=2 or admin='-gast-')