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有人可以将这个函数从SQL Server转换为PostgreSQL吗?将函数从SQL Server转换到PostgreSQL
该函数获取开始和结束日期并创建日期范围并生成输出。
CREATE FUNCTION [dbo].[DateRange]
(
@Increment CHAR(1),
@StartDate DATETIME,
@EndDate DATETIME
)
RETURNS
@SelectedRange TABLE
(IndividualDate DATETIME)
AS
BEGIN
;WITH cteRange (DateRange) AS (
SELECT @StartDate
UNION ALL
SELECT
CASE
WHEN @Increment = 'd' THEN DATEADD(dd, 1, DateRange)
WHEN @Increment = 'w' THEN DATEADD(ww, 1, DateRange)
WHEN @Increment = 'm' THEN DATEADD(mm, 1, DateRange)
END
FROM cteRange
WHERE DateRange <=
CASE
WHEN @Increment = 'd' THEN DATEADD(dd, -1, @EndDate)
WHEN @Increment = 'w' THEN DATEADD(ww, -1, @EndDate)
WHEN @Increment = 'm' THEN DATEADD(mm, -1, @EndDate)
END)
INSERT INTO @SelectedRange (IndividualDate)
SELECT DateRange
FROM cteRange
OPTION (MAXRECURSION 3660);
RETURN
END
GO
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