Pass a range of dates to a scalar user defined function in SQL SERVER

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Hi, I have a following UDF function that takes a date parameter and returns 4 fields.

SQL

select a,b,c,d from [dbo].[udf_ConfReportedDate] ({D'2017-05-31'})

I would like to pass a range of dates say from 2017-05-31 to 2017-06-30 one by one and append my output. How can I achieve that?

Please note that my UDF can only take one date at a time.

What I have tried:

DECLARE @Start_Date DATETIME ='2016-06-01'
DECLARE @End_Date DATETIME ='2016-12-31'

Select * from [dbo].[udf_ConfReportedDate] ({D'2017-05-31'})

But it just gives for one date. Can I pass dates using while loop or CTE or something?

Posted 17-Aug-18 1:45am

Member 13952568

Updated 17-Aug-18 4:31am

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PeejayAdams · Answer 1 · 2018-08-17T04:31:00

This will give you an effective tally table of the dates required, just work your function call into the SELECT and you should be okay:

DECLARE @toDate DATE
DECLARE @fromDate DATE
SET @fromDate = '2017-05-31'
SET @toDate='2017-06-30'
 
;WITH cte (Date)  AS
(
    SELECT @fromDate 
        UNION ALL
    SELECT DATEADD(DAY, 1, Date)
        FROM cte
        WHERE Date < @toDate
)
SELECT * FROM cte