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(SELECT COUNT(m.id) FROM course_menu_exam m LEFT JOIN goods_course c on m.course_id=c.course_id LEFT JOIN class_grade_goods cgg on cgg.goods_id = c.goods_id where cg.grade_id=cgg.grade_id and m.type = 1 ) as exam_num,
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(SELECT COUNT(m.id) FROM course_menu_exam m LEFT JOIN goods_course c on m.course_id=c.course_id LEFT JOIN class_grade_goods cgg on cgg.goods_id = c.goods_id where cg.grade_id=cgg.grade_id and m.type = 1 ) as exam_num,
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