mysql 查询时候 用select * from table where id in (1,2,3);这个时候，返回的结果不必定是按照id=(1,2,3)顺序返回。假如须要按顺序输出的话，咱们能够加上ORDER BY FIELD(id,1,2,3)就ok了。里面的id为对应的字段名mysql
SELECT * FROM table WHERE id IN (1,2,3) ORDER BY FIELD(id,1,2,3);