<sql>SELECT id,exam_name,exam_time,exam_time_end,exam_model,grade_id,grade_name,exam_type FROM union_yuejuan_source_process.bus_exam WHERE id=${exam_id}</sql>
<sql>SELECT a.exam_id,a.student_id,a.subject_id,b.subject_name,a.source_score,a.score FROM union_yuejuan_fundamental.fundamental_subject_score_rank as a left join union_yuejuan_source_process.bus_exam_subject as b on a.subject_id=b.id WHERE exam_id=${exam_id}</sql>