select role_id ,role_name from role; insert into users(user_id,role_id,username,password,person_name) values(#{userId},#{roleId},#{username},#{password},#{personName}) select * from users where user_id = #{userId} or username = #{username} select * from users where user_id != #{userId} and username = #{username} select y.user_id, r.role_name, y.username, y.password, y.person_name, y.create_time, y.update_time from users y left join role r on r.role_id=y.role_id y.role_id=#{roleId} and username=#{username} and person_name=#{personName} update users set role_id = #{roleId}, username=#{username} , password=#{password} , person_name=#{personName},update_time=#{updateTime} where user_id=#{userId}