MyBatis更新语句

MyBatis更新语句

<update id="updateArea" parameterType="com.example.applet.entity.Area" >
    update  tb_area
    <set>
        <if test="areaName!=null">area_name=#{areaName},</if>
        <if test="priority!=null">priority=#{priority},</if>
        <if test="lastEditTime!=null">last_edit_time=#{lastEditTime}</if>
    </set>
    where  area_id=#{areaId}
</update>