MySQL中查询后记录集的排序问题
在MySQL上一般的查询要么是按一个字段的升序，要么按降序进行排序，如果实现根据条件里值的左右顺序来显示记录呢，如 where id i
在MySQL上一般的查询要么是按一个字段的升序，要么按降序进行排序，如果实现根据条件里值的左右顺序来显示记录呢，如 where id in (3,1,5,2)此类的，查询出来的记录从上到下也是(3,1,5,2)这类的顺序了，可以用以下语句来实现：
SELECT * FROM documents WHERE id IN (3,5,7) ORDER BY FIELD(id,3,5,7)
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