select * from t_user username = #{name} and password = #{pass} UPDATE `db2`.`t_user` `username` = #{username}, `password` = #{password}, `gender` = #{gender}, `address` = #{address}, `dept_id` = #{deptId} `id` = #{id} ; select * from t_user and username = #{name} and password = #{pass} select from t_user where id in #{id} username , password , gender , address , dept_id