可能是這樣的,你正在尋找:
DECLARE @DummyClient TABLE(ID INT IDENTITY,ClientName VARCHAR(100));
DECLARE @DummyDates TABLE(ClientID INT,YourDate DATE);
INSERT INTO @DummyClient VALUES
('A'),('B');
INSERT INTO @DummyDates VALUES
(1,{d'2016-12-15'}),(2,{d'2017-01-01'});
WITH Numbers AS
( SELECT 0 AS Nr
UNION ALL SELECT 1
UNION ALL SELECT 2
UNION ALL SELECT 3
UNION ALL SELECT 4
UNION ALL SELECT 5
UNION ALL SELECT 6
UNION ALL SELECT 7
UNION ALL SELECT 9
UNION ALL SELECT 10
UNION ALL SELECT 11
UNION ALL SELECT 12
UNION ALL SELECT 13
UNION ALL SELECT 14
UNION ALL SELECT 15
UNION ALL SELECT 16
UNION ALL SELECT 17
UNION ALL SELECT 18
UNION ALL SELECT 19
UNION ALL SELECT 20
UNION ALL SELECT 21
UNION ALL SELECT 22
UNION ALL SELECT 23
UNION ALL SELECT 24
)
,ClientExt AS
(
SELECT c.*
,MIN(d.YourDate) AS MinDate
FROM @DummyClient AS c
INNER JOIN @DummyDates AS d ON c.ID=d.ClientID
GROUP BY c.ID,c.ClientName
)
SELECT ID,ClientName,D
FROM ClientExt
CROSS APPLY(SELECT DATEADD(MONTH,Numbers.Nr,MinDate)
FROM Numbers) AS RunningDate(D);
結果
ID Cl Date
1 A 2016-12-15
1 A 2017-01-15
1 A 2017-02-15
1 A 2017-03-15
1 A 2017-04-15
1 A 2017-05-15
1 A 2017-06-15
1 A 2017-07-15
1 A 2017-09-15
1 A 2017-10-15
1 A 2017-11-15
1 A 2017-12-15
1 A 2018-01-15
1 A 2018-02-15
1 A 2018-03-15
1 A 2018-04-15
1 A 2018-05-15
1 A 2018-06-15
1 A 2018-07-15
1 A 2018-08-15
1 A 2018-09-15
1 A 2018-10-15
1 A 2018-11-15
1 A 2018-12-15
2 B 2017-01-01
2 B 2017-02-01
2 B 2017-03-01
2 B 2017-04-01
2 B 2017-05-01
2 B 2017-06-01
2 B 2017-07-01
2 B 2017-08-01
2 B 2017-10-01
2 B 2017-11-01
2 B 2017-12-01
2 B 2018-01-01
2 B 2018-02-01
2 B 2018-03-01
2 B 2018-04-01
2 B 2018-05-01
2 B 2018-06-01
2 B 2018-07-01
2 B 2018-08-01
2 B 2018-09-01
2 B 2018-10-01
2 B 2018-11-01
2 B 2018-12-01
2 B 2019-01-01
你存儲*偏移*(或*切斷*)的地方?我假設有一個'客戶'的表'列'CutOff INT NOT NULL',其中B有'1',A有'15'。我的假設是否正確? – Shnugo
@Shnugo不幸的是,沒有任何地方存儲這些價值。我們只有截止日期,因爲它是由我們的客戶輸入 –
因此,客戶的最早(第一個)現有日期決定了這個*截止日期*?你將來需要多久才能做到這一點? – Shnugo