INSERT INTO student_course_homework_reply
(id_,student_course_homework_id_,user_id_,content_,create_time_,parent_id_)
VALUES(#{id},#{studentCourseHomeworkId},#{userId},#{content},now(),#{parentId})
UPDATE student_course_homework_reply
parent_id_ = #{parentId},
student_course_homework_id_ = #{studentCourseHomeworkId},
user_id_ = #{userId},
content_ = #{content},
WHERE id_ = #{id}
DELETE FROM student_course_homework_reply WHERE id_ = #{id}
delete from student_course_homework_reply where id_ IN
#{id}
AND schr.parent_id_ = #{parentID}
AND schr.parent_id_ IS NULL
AND schr.student_course_homework_id_=#{studentCourseHomeworkId}