這是閏年安全,處理日期範圍,其他答案目前沒有。
DECLARE @d TABLE(from_date DATE, to_date DATE);
INSERT @d VALUES ('2013-11-25','2013-12-05');
;WITH n(n) AS
(
SELECT ROW_NUMBER() OVER (ORDER BY [object_id])-1 FROM sys.all_columns
),
d(n,f,t,md,bp,ep) AS
(
SELECT n.n, d.from_date, d.to_date,
DATEDIFF(MONTH, d.from_date, d.to_date),
DATEADD(MONTH, n.n, DATEADD(DAY, 1-DAY(from_date), from_date)),
DATEADD(DAY, -1, DATEADD(MONTH, 1, DATEADD(MONTH, n.n,
DATEADD(DAY, 1-DAY(from_date), from_date))))
FROM n INNER JOIN @d AS d
ON d.to_date >= DATEADD(MONTH, n.n-1, d.from_date)
)
SELECT original_from_date = f, original_to_date = t,
new_from_date = CASE n WHEN 0 THEN f ELSE bp END,
new_to_date = CASE n WHEN md THEN t ELSE ep END
FROM d WHERE md >= n
ORDER BY original_from_date, new_from_date;
結果:
original_from_date original_to_date new_from_date new_to_date
------------------ ---------------- ------------- -----------
2013-11-25 2013-12-05 2013-11-25 2013-11-30
2013-11-25 2013-12-05 2013-12-01 2013-12-05
SQLFiddle demo with longer date ranges and leap years
以下是*幾乎*相同。它只適用於整整數月,但它應該是微不足道的修改它在部分月份以及以下工作:http://stackoverflow.com/questions/7218526/split-date-range-into-months – Heinzi
如果日期跨度3個月例如「2013-11-25」到「2014-02-05」應該分成3行還是4行? – GarethD