insert into t_question (content, courseId, addDate, type, userId) values (#{content}, #{courseId}, now(), #{type}, #{userId}); select * from t_question order by id desc limit 1 select * from t_question order by id desc select * from t_question and content like #{content} and courseId = #{courseId} and userId = #{userId} order by id desc limit #{start},#{size} select * from t_question where id = #{id} select * from t_question where userId = #{userId} order by id desc delete from t_question where id = #{id} update t_question content=#{content}, courseId=#{courseId}, where id = #{id} select count(*) from t_question and content like #{content} and courseId = #{courseId} and userId = #{userId} select * from t_question where courseId = #{param1} and type = #{param2}