e.title,f.uid as userId,f.examId,f.examPaperId,f.score,f.trueScore,f.maxScoreTime,f.lastTime,f.areaId, f.howMuch,f.avgScore,f.bigQuesScore , case when f.score >= 85 then 'A' when f.score >=80 then 'B' when f.score >=70 then 'C' when f.score >=60 then 'D' else 'E' end as level