zsl65326的专栏

如下成绩表:report 1、查找所有分数高于80分的学生 select name from report group by name having min(score) > 80; 分析：先对表内数据按名字进行分组, 再在分组的数据中找出最低分大于80的学生 having  和min 结合使用, 用来限制分数最小值不能为80； 其它限制函数： having min(列名)

以下为开发者说： There are a few reasons: 1) They are not very memory intensive. It's up to you basically. Changing parameters about the probability of a node to have a given number of levels will make then