t.id_ as "id" , t.course_group_id_ as "courseGroupId" , t.course_group_type_ as "courseGroupType" , t.course_schedule_id_ as "courseScheduleId" , t.title_ as "title" , t.content_ as "content" , t.attachments_ as "attachments" , t.expect_num_ as "expectNum" , t.completed_num_ as "completedNum" , t.create_time_ as "createTime" , t.update_time_ as "updateTime" SELECT FROM course_homework t