Error: The order by clause is invalid in views - sql

Question

I'm getting the following error in SQL Server 14 where I am trying to build a view based on 4 tables
The ORDER BY clause is invalid in views, inline functions, derived
tables, subqueries, and common table expressions, unless TOP, OFFSET
or FOR XML is also specified
How do I fix the below so I don't get this error?
SELECT dbo.PS_Proj.[Project ID],
case
when PS_Proj.[City Name] is not null then concat(PS_Proj.[City Name], ' ', PS_Proj.[State])
when PS_Billing.[Location] is not null then max(PS_Billing.[Location])
when PS_Time.[Labor Location ID] is not null then max(PS_Location.[Labor Location Name])
else null
end AS [Location]
FROM dbo.PS_Location RIGHT OUTER JOIN
dbo.PS_Time ON dbo.PS_Location.[Labor Location ID] = dbo.PS_Time.[Labor Location ID] RIGHT OUTER JOIN
dbo.PS_Proj ON dbo.PS_Time.[Project ID] = dbo.PS_Proj.[Project ID] LEFT OUTER JOIN
dbo.PS_Billing ON dbo.PS_Proj.[Project ID] = dbo.PS_Billing.[Project ID]
ORDER BY PS_Billing.[T/S Date], PS_Time.[Date]
I'd like for the most recent PS_Billing location to show and if that is null for the most recent PS_Time location to show.

Answer 1

Create your view without Order By. Remove ORDER BY PS_Billing.[T/S Date], PS_Time.[Date] And add them to your SELECT.
SELECT
PS_Billing.[T/S Date] AS TsDate,
PS_Time.[Date] AS Date,
dbo.PS_Proj.[Project ID],
case
when PS_Proj.[City Name] is not null then concat(PS_Proj.[City Name], ' ', PS_Proj.[State])
when PS_Billing.[Location] is not null then max(PS_Billing.[Location])
when PS_Time.[Labor Location ID] is not null then max(PS_Location.[Labor Location Name])
else null
end AS [Location]
FROM dbo.PS_Location RIGHT OUTER JOIN
dbo.PS_Time ON dbo.PS_Location.[Labor Location ID] = dbo.PS_Time.[Labor Location ID] RIGHT OUTER JOIN
dbo.PS_Proj ON dbo.PS_Time.[Project ID] = dbo.PS_Proj.[Project ID] LEFT OUTER JOIN
dbo.PS_Billing ON dbo.PS_Proj.[Project ID] = dbo.PS_Billing.[Project ID]
And select from your view with order by line
Select FROM YOUR_VIEW_NAME as V
Order By V.TsDate, V.Date

Answer 2

You have some aggregate data inside your case expression and you don't have a group by. I am making some guesses here. Also, you should get in the habit of using aliases, it makes things a lot simpler. I would also suggest not putting spaces in your column names as it forces you to constantly wrap columns in square brackets.
Something like this should get you close.
SELECT p.[Project ID]
, MAX(case
when p.[City Name] is not null then concat(p.[City Name], ' ', p.[State])
when b.[Location] is not null then b.[Location]
when t.[Labor Location ID] is not null then l.[Labor Location Name]
else null
end) AS [Location]
FROM dbo.PS_Location l
RIGHT OUTER JOIN dbo.PS_Time t ON l.[Labor Location ID] = t.[Labor Location ID]
RIGHT OUTER JOIN dbo.PS_Proj p ON t.[Project ID] = p.[Project ID]
LEFT OUTER JOIN dbo.PS_Billing b ON p.[Project ID] = b.[Project ID]
GROUP BY p.[Project ID]