执行SQL发生错误!错误:no such column: ext_type,语句:SELECT COUNT(*) AS sum FROM ay_content a LEFT JOIN ay_content_sort b ON a.scode=b.scode LEFT JOIN ay_content_sort c ON a.subscode=c.scode LEFT JOIN ay_model d ON b.mcode=d.mcode LEFT JOIN ay_content_ext e ON a.id=e.contentid WHERE(a.scode in ('8') OR a.subscode='8') AND(a.status=1 AND d.type=2 AND a.date<'2021-05-12 07:11:56') AND(ext_type like '%专业版%' )