查詢如何添加缺少的日期在SQL

Question

需要知道如何添加日期用零數據丟失的相應字段

**05/28/2012 NULL 
05/29/2012 NULL 
05/30/2012 NULL 
05/30/2012 Break In 
05/30/2012 Break Out 
05/31/2012 NULL** 

06/03/2012 NULL 
06/03/2012 Break In 
06/03/2012 Break Out 
06/03/2012 In Duty 
06/03/2012 Out Duty 
06/04/2012 NULL 
06/04/2012 In Duty 
06/04/2012 Out Duty 
06/05/2012 NULL 
06/05/2012 Break In 
06/05/2012 Break Out 
06/06/2012 NULL 
06/06/2012 Break In 
06/06/2012 Break Out 
06/06/2012 In Duty 
06/06/2012 Out Duty 
06/07/2012 NULL 
06/07/2012 In Duty 
06/07/2012 Out Duty 

06/10/2012 NULL 
06/10/2012 Break Out 
06/10/2012 In Duty 
06/10/2012 Out Duty 
06/11/2012 NULL 
06/11/2012 In Duty 
06/11/2012 Out Duty 
06/12/2012 NULL 
06/13/2012 NULL 
06/14/2012 NULL 

結果，我需要的是這樣的：

05/28/2012 NULL 
05/29/2012 NULL 
05/30/2012 NULL 
05/30/2012 Break In 
05/30/2012 Break Out 
05/31/2012 NULL 
06/01/2012  null 
06/02/2012  null 
06/03/2012 NULL 
06/03/2012 Break In 
06/03/2012 Break Out 
06/03/2012 In Duty 
06/03/2012 Out Duty 
06/04/2012 NULL 
06/04/2012 In Duty 
06/04/2012 Out Duty 
06/05/2012 NULL 
06/05/2012 Break In 
06/05/2012 Break Out 
06/06/2012 NULL 
06/06/2012 Break In 
06/06/2012 Break Out 
06/06/2012 In Duty 
06/06/2012 Out Duty 
06/07/2012 NULL 
06/07/2012 In Duty 
06/07/2012 Out Duty 
06/08/2012  null 
06/09/2012  null 
06/10/2012 NULL 
06/10/2012 Break Out 
06/10/2012 In Duty 
06/10/2012 Out Duty 
06/11/2012 NULL 
06/11/2012 In Duty 
06/11/2012 Out Duty 
06/12/2012 NULL 
06/13/2012 NULL 
06/14/2012 NULL 

Answer 1

窗體中日期日曆有開始和結束日期範圍和執行左鍵與你的表連接，以獲得所需的結果。

例如

DECLARE @t TABLE(Dt Datetime, Value VARCHAR(20) NULL) 
INSERT INTO @t VALUES 
('05/28/2012',NULL), 
('05/29/2012',NULL), 
('05/30/2012',NULL),('05/30/2012','Break In'),('05/30/2012','Break Out'), 
('05/31/2012',NULL), 
('06/03/2012',NULL),('06/03/2012','Break In'),('06/03/2012','Break Out'),('06/03/2012','In Duty'),('06/03/2012','Out Duty'), 
('06/04/2012',NULL),('06/04/2012','In Duty'),('06/04/2012','Out Duty'), 
('06/05/2012',NULL),('06/05/2012','Break In'),('06/05/2012','Break Out'), 
('06/06/2012',NULL),('06/06/2012','Break In'),('06/06/2012','Break Out'),('06/06/2012','In Duty'),('06/06/2012','Out Duty'), 
('06/07/2012',NULL),('06/07/2012','In Duty'),('06/07/2012','Out Duty'), 
('06/10/2012',NULL),('06/10/2012','Break Out'),('06/10/2012','In Duty'),('06/10/2012','Out Duty'), 
('06/11/2012',NULL),('06/11/2012','In Duty'),('06/11/2012','Out Duty'), 
('06/12/2012',NULL), 
('06/13/2012',NULL), 
('06/14/2012',NULL) 


DECLARE @startDate DATETIME, @endDate DATETIME 
SELECT @startDate = '2012-05-28', @endDate = '2012-06-14' --yyyy-mm-dd 
;WITH Calender AS (
    SELECT @startDate AS CalanderDate 
    UNION ALL 
    SELECT CalanderDate + 1 FROM Calender 
    WHERE CalanderDate + 1 <= @endDate 
) 
SELECT 
    [Date] = Convert(VARCHAR(10),CalanderDate,101) 
    ,Value 
FROM Calender c 
LEFT JOIN @t t 
ON t.Dt = c.CalanderDate 

結果

Date Value 
05/28/2012 NULL 
05/29/2012 NULL 
05/30/2012 NULL 
05/30/2012 Break In 
05/30/2012 Break Out 
05/31/2012 NULL 
06/01/2012 NULL 
06/02/2012 NULL 
06/03/2012 NULL 
06/03/2012 Break In 
06/03/2012 Break Out 
06/03/2012 In Duty 
06/03/2012 Out Duty 
06/04/2012 NULL 
06/04/2012 In Duty 
06/04/2012 Out Duty 
06/05/2012 NULL 
06/05/2012 Break In 
06/05/2012 Break Out 
06/06/2012 NULL 
06/06/2012 Break In 
06/06/2012 Break Out 
06/06/2012 In Duty 
06/06/2012 Out Duty 
06/07/2012 NULL 
06/07/2012 In Duty 
06/07/2012 Out Duty 
06/08/2012 NULL 
06/09/2012 NULL 
06/10/2012 NULL 
06/10/2012 Break Out 
06/10/2012 In Duty 
06/10/2012 Out Duty 
06/11/2012 NULL 
06/11/2012 In Duty 
06/11/2012 Out Duty 
06/12/2012 NULL 
06/13/2012 NULL 
06/14/2012 NULL 

希望這有助於

Answer 2

最好的選擇是保留一個日曆表，其中包含您想要計算的某些年份的所有日期，然後與該表格左加入

select date,col1 
from calender_table c 
left join 
your_table t 
on c.[date]=t.[date] 

你可以很容易地創建一個日曆表。網上有很多腳本可用。 click for examples

Answer 3

Declare @stDate datetime='05/28/2012' 
declare @eddate datetime='06/14/2012' 
select DATEADD(day,number,@stdate) from master..spt_values where type='P' 
and DATEADD(day,number,@stdate) <= @eddate 

這裏剛剛加入這個結果與你的表上的日期欄來獲得丟失的日期