题目描述 Farmer John has taken his cows on a trip to the city! As the sun sets, the cows gaze at the city horizon and observe the beautiful silhouettes formed by the rectangular buildings. The entire horizon is represented by a number line with N (1 ≤ N
paip.输入法编程---带ord gudin去重复- 作者Attilax , EMAIL:1466519819@qq.com 来源:attilax的专栏 地址:http://blog.csdn.net/attilax --------查询重复(不同ORD) SELECT hezi, atian, gudin, count(id) AS num FROM gaopinzi WHERE LENGTH(atian) > 0 and ( del is null or del