group by o.ownerid having count(o.id)>=2请问group by 和 小弟愚笨,希望可以详细说下,举个例子 ,也方便理解...

group by o.ownerid having count(o.id)>=2请问group by 和 小弟愚笨,希望可以详细说下,举个例子 ,也方便理解... group by group的意思 order by 和 group by 的区别? Directed by you group是什么意思.答案越多越好. 想知道group by的具体用法 by working with a group是什么意思. group by zuozhebianhao having count(*)>=3 group by(A+B)和group by A,B 的区别? A compound is 54.53% C,9.15% H,and 36.32% O by mass.What is its empirical group group: Group Group group的语句能否写成where?where的语句能否写成group by? 数据库的group by有什么意义呢?(sql server) i always study by (work) with a group SQL语句select * from 表名 group by 列名--不是 GROUP BY 表达式RTselect * from 表名 group by 列名----- 报错 ORA-00979:不是 GROUP BY 表达式数据库:oracle10g* 换成 列名也不行 英语翻译I study by working with a group