实例：
SELECT plate_no,user_car_id FROM customer_user_car WHERE user_car_id IN (57603,57612,57607,57605)这样的情况取出来后，其实，id还是按由小到大排序的，但如果我们真要按IN里面的顺序排序怎么办？SQL能不能完成？是否需要取回来后再foreach一下？其实mysql就有这个方法 ：
SELECT plate_no FROM customer_user_car WHERE user_car_id IN (57603,57612,57607,57605) ORDER BY FIELD(user_car_id,57603,57612,57607,57605)另一个使用group_concat时的例子：
SELECT GROUP_CONCAT(COUNT ORDER BY FIELD(template_member_id,20,19,18)) AS counts FROM market_item_counting_card_template_memeber WHERE template_member_id IN (20,19,18)记录一下。 参考自： https://blog.csdn.net/swazer_z/article/details/50633964
