<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.cyberlanting.Assignments.mapper.UserMapper">

    <update id="update">
        update user
        <set>
            <if test="user.name != null">name = #{user.name},</if>
            <if test="user.age != null">age = #{user.age}</if>
        </set>
        where id = #{id}
    </update>
</mapper>