Getting dates between specific dates comma-separated - sql-server-2008

Question

I have the following table:
CREATE TABLE dbo.Test
(
Name NVARCHAR(50)
,StartDate DATE
,EndDate DATE
)
INSERT INTO dbo.Test VALUES('ABC','28-Feb-14','03-Mar-14')
INSERT INTO dbo.Test VALUES('DEF','04-Mar-14','04-Mar-14')
Basically this contain start and end date of leave for a given user. I am expecting an output as shown below.
Expected output:
Name | WorkHour| LeaveHour | Remarks
-------------------------------------
ABC | 27 | 18 | 28-Feb, 03-Mar
DEF | 36 | 9 | 04-Mar
1 day of leave corresponds to 9 hours and a work week refers to Friday to the next Thursday. In this case that would be from 28-Feb to 06-Mar.
WorkHour refers to number of hours user has worked barring the leaves and not including the weekends.
LeaveHour refers to the number of hours user is on leave.
'Remarks' refers to distinct leaves for the user between StartDate and EndDate values that should appear as comma separated.
I am able to get the work hour (including weekends which is not desired), leave hour values but finding it difficult to have remarks and value excluding weekends
SELECT
RN.Name
,ISNULL(45 - ((DATEDIFF(DD, VT.StartDate, VT.EndDate) + 1) * 9 ), 0) AS 'WorkHours'
,ISNULL(((DATEDIFF(DD, VT.StartDate, VT.EndDate) + 1) * 9 ), 0) AS 'LeaveHours'
--distinct leave dates seperated by comma should be displayed as remarks
FROM
Test VT
LEFT JOIN
ResourceNames RN ON VT.UserId = RN.UserId
Can anyone help?

Answer 1

This should not be done in SQL, but here is a function that will do what you want:
create function CSVDates (#startDate datetime, #endDate datetime)
returns nvarchar(4000)
as
begin
declare #csv nvarchar(4000) = ''
declare #maxDays int = DATEDIFF(DD, #startDate, #endDate)
declare #count int = 0
declare #date datetime
while(#count <= #maxDays )
begin
if (DATENAME(dw, #date) = 'Saturday' OR DATENAME(dw, #date) = 'Sunday')
BEGIN
set #count = #count + 1
CONTINUE
END
set #date = DATEADD(d,#count, #startDate)
if (len(#csv) > 0) set #csv = #csv + ','
set #csv = #csv + DATENAME(day,#date) + '-' + DATENAME(month,#date)
set #count = #count + 1
end
return #csv
end
plug it into your select as CSVDates(vt.StartDate, vt.EndDate)
if you have a lot of dates in between, nvarchar(4000) may not be enough...

Answer 2

I figured out what was going wrong as finally I had time to work on this. Basically the block under weekend was not allowing date to get incremented which was resulting in the data not appearing.
Here is the working code for someone looking for similar ask
create function CSVDates (#startDate datetime, #endDate datetime)
returns nvarchar(4000)
as
begin
declare #csv nvarchar(4000) = ''
declare #maxDays int = DATEDIFF(DD, #startDate, #endDate)
declare #count int = 0
--assign start date
declare #date datetime = #startDate
while(#count <= #maxDays )
begin
if (DATENAME(dw, #date) = 'Saturday' OR DATENAME(dw, #date) = 'Sunday')
begin
--do nothing
set #count =#count
end
else
begin
if (len(#csv) > 0)
set #csv = #csv + ','
set #csv = #csv + DATENAME(day,#date) + '-' + SUBSTRING(DATENAME(month,#date),1,3)
end
set #count = #count + 1
set #date = DATEADD(d,#count, #startDate)
end
return #csv
end