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我在SQL Server中有一個表,名爲「surname」和「Date」(DateTime)的列。該表是用於休假請求。我如何構建一條SQL語句來查看每天會有多少人失蹤?問題是,這個查詢不會告訴我,實際上有8人將在9月2日失蹤。例如,給出以下數據:根據日期確定計數
surname Date Duration
------- ---------- ---------
Bertram 2011-09-01 3
Coulois 2011-09-01 5
LeBlanc 2011-09-01 6
Fosters 2011-09-01 3
Blanche 2011-09-01 2
Bertram 2011-09-02 6
Gillian 2011-09-02 4
Pikklar 2011-09-02 7
Thierry 2011-09-03 6
Selanne 2011-09-03 6
或者
CREATE TABLE #VRs(surname NVARCHAR(32), [Date] DATETIME);
INSERT #VRs SELECT 'Bertram','2011-09-01'
UNION ALL SELECT 'Coulois','2011-09-01'
UNION ALL SELECT 'LeBlanc','2011-09-01'
UNION ALL SELECT 'Fosters','2011-09-01'
UNION ALL SELECT 'Blanche','2011-09-01'
UNION ALL SELECT 'Bertram','2011-09-02'
UNION ALL SELECT 'Gillian','2011-09-02'
UNION ALL SELECT 'Pikklar','2011-09-02'
UNION ALL SELECT 'Thierry','2011-09-03'
UNION ALL SELECT 'Selanne','2011-09-03';
我想要的結果如下:
Date Count
----- -----
1 Sep 5
2 Sep 3
3 Sep 2
任何想法如何處理呢?
我已經在修改後重新開放。不幸的是,我無法對降薪提出任何建議。 – Will