insert into tld_user_material(material_id,user_id,scrq,modify_user,modify_time) value(#{materialId},#{userId},now(),#{modifyUser},now()) update tld_user_material material_id = #{materialId}, user_id = #{userId}, modify_user = #{modifyUser},modify_time=now(), where id = #{id} delete from tld_user_material where id = #{id}