详解 Mysql查询结果顺序按 in() 中ID 的顺序排列

<select id="querygbstylebyids" resultmap="stylemap"> 
    select style_num_id ,style_id,style_title,style_pic from gb_style where online = 1 and is_hide = 0 and style_num_id in 
    <foreach collection="stylenumids" item="stylenumid" separator="," open="(" close=")"> 
     #{stylenumid} 
    </foreach> 
    order by field 
    <foreach collection="stylenumids" item="stylenumid" separator="," open="(style_num_id," close=")"> 
      #{stylenumid} 
    </foreach> 
  </select> 

select style_num_id ,style_id,style_title,style_pic from gb_style where online = 1 and is_hide = 0 and style_num_id in (1,3,2,5) 
order by field (style_num_id,1,3,2,5);