Reputation: 115
Given:
I need to get this output:
01-02-2017
01-09-2017
01-16-2017
01-23-2017
01-30-2017
02-06-2017
I want to create a stored procedure that will insert dates between a date range given a day
CREATE sp_InsertReservation
(@DateFrom date,
@DateTo date,
@Day)
AS
BEGIN
--A Loop through @DateFrom and @DateTo getting the date given the day
BEGIN
INSERT INTO Reservation(...DayDate...)
VALUES (...[date that was on the given day]...)
END
END
SQL Server 2012 and below
Upvotes: 2
Views: 1149
Reputation: 81960
I'll often use a TVF to create dynamic date ranges. You supply the desired range, DatePart, and increment. A Tally/Numbers Table or even a Calendar Table would do the trick as well
Example
Select *
From [dbo].[udf-Range-Date] ('2017-01-01','2017-02-06','DD',1)
Where DateName(DW,retval) = 'Monday'
Returns
RetSeq RetVal
2 2017-01-02 00:00:00.000
9 2017-01-09 00:00:00.000
16 2017-01-16 00:00:00.000
23 2017-01-23 00:00:00.000
30 2017-01-30 00:00:00.000
37 2017-02-06 00:00:00.000
The UDF
CREATE FUNCTION [dbo].[udf-Range-Date] (@R1 datetime,@R2 datetime,@Part varchar(10),@Incr int)
Returns Table
Return (
with cte0(M) As (Select 1+Case @Part When 'YY' then DateDiff(YY,@R1,@R2)/@Incr When 'QQ' then DateDiff(QQ,@R1,@R2)/@Incr When 'MM' then DateDiff(MM,@R1,@R2)/@Incr When 'WK' then DateDiff(WK,@R1,@R2)/@Incr When 'DD' then DateDiff(DD,@R1,@R2)/@Incr When 'HH' then DateDiff(HH,@R1,@R2)/@Incr When 'MI' then DateDiff(MI,@R1,@R2)/@Incr When 'SS' then DateDiff(SS,@R1,@R2)/@Incr End),
cte1(N) As (Select 1 From (Values(1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) N(N)),
cte2(N) As (Select Top (Select M from cte0) Row_Number() over (Order By (Select NULL)) From cte1 a, cte1 b, cte1 c, cte1 d, cte1 e, cte1 f, cte1 g, cte1 h ),
cte3(N,D) As (Select 0,@R1 Union All Select N,Case @Part When 'YY' then DateAdd(YY, N*@Incr, @R1) When 'QQ' then DateAdd(QQ, N*@Incr, @R1) When 'MM' then DateAdd(MM, N*@Incr, @R1) When 'WK' then DateAdd(WK, N*@Incr, @R1) When 'DD' then DateAdd(DD, N*@Incr, @R1) When 'HH' then DateAdd(HH, N*@Incr, @R1) When 'MI' then DateAdd(MI, N*@Incr, @R1) When 'SS' then DateAdd(SS, N*@Incr, @R1) End From cte2 )
Select RetSeq = N+1
,RetVal = D
From cte3,cte0
Where D<=@R2
)
/*
Max 100 million observations -- Date Parts YY QQ MM WK DD HH MI SS
Syntax:
Select * from [dbo].[udf-Range-Date]('2016-10-01','2020-10-01','YY',1)
Select * from [dbo].[udf-Range-Date]('2016-01-01','2017-01-01','MM',1)
*/
Upvotes: 4