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我使用Oracle 10g和我的登錄用戶
如何獲得唯一的名稱的總和,同時按日期分組
created userid
-------------------- ------
10-jul-2014 10:10:10 usr1
10-jul-2014 10:12:10 usr2
10-jul-2014 11:12:10 usr1
10-jul-2014 12:12:10 usr3
13-jul-2014 10:12:10 usr1
13-jul-2014 11:12:10 usr2
表
我期待的輸出是
created count(userid)
----------- ------------------
10-jul-2014 3 (3 unique users)
13-jul-2014 2 (2 unique users)
查詢我想出了沒有按預期工作
select trunc(created) cr, userid
from loggedinusers
group by trunc(created), userid
order by trunc(created) asc;