SQL function in view table - sql

Question

I have this function which shows years, months and days between dates. On a view table I have data with start and finish dates. How is it possible to integrate that function it into my view table?
USE [DB]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
alter FUNCTION [db].[GetDateDifference]
(
#FromDate DATETIME, #ToDate DATETIME
)
RETURNS
#DateDifference TABLE (
YEAR INT, MONTH INT, DAYS INT)
AS
BEGIN
DECLARE #Years INT, #Months INT, #Days INT, #tmpFromDate DATETIME
SET #Years = DATEDIFF(YEAR, #FromDate, #ToDate)
- (CASE WHEN DATEADD(YEAR, DATEDIFF(YEAR, #FromDate, #ToDate),
#FromDate) > #ToDate THEN 1 ELSE 0 END)
SET #tmpFromDate = DATEADD(YEAR, #Years , #FromDate)
SET #Months = DATEDIFF(MONTH, #tmpFromDate, #ToDate)
- (CASE WHEN DATEADD(MONTH,DATEDIFF(MONTH, #tmpFromDate, #ToDate),
#tmpFromDate) > #ToDate THEN 1 ELSE 0 END)
SET #tmpFromDate = DATEADD(MONTH, #Months , #tmpFromDate)
SET #Days = DATEDIFF(DAY, #tmpFromDate, #ToDate)
- (CASE WHEN DATEADD(DAY, DATEDIFF(DAY, #tmpFromDate, #ToDate),
#tmpFromDate) > #ToDate THEN 1 ELSE 0 END)
INSERT INTO #DateDifference
VALUES(#Years, #Months, #Days)
RETURN
END
and here is my view table:
USE [DB]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
alter VIEW [db].[View_ServiceTickets]
AS
SELECT TOP 99
ServiceTicketDate,
BillingDate as 'Project Finished',
InspectionScheduleDate
FROM tblServiceTicket INNER JOIN
tblServiceTicketReport on tblServiceTicket.ServiceTicketID = tblServiceTicketReport.ServiceTicketID
where ServiceTicketDate > '2016'
order by ServiceTicketDate desc
GO
Thank you so much

Answer 1

I saw the return data type of your function is a table, so you use treat it as a table.
you can test the following:
alter VIEW [db].[View_ServiceTickets]
AS
SELECT TOP 99
ServiceTicketDate,
BillingDate as 'Project Finished',
InspectionScheduleDate,
d.*
FROM tblServiceTicket INNER JOIN
tblServiceTicketReport on tblServiceTicket.ServiceTicketID = tblServiceTicketReport.ServiceTicketID
OUTER APPLY(SELECT YEAR,MONTH,DAYS FROM [db].[GetDateDifference](ServiceTicketDate,BillingDate)) d
where ServiceTicketDate > '2016'
order by ServiceTicketDate desc