How to use result of an SQL select statement in dbo.fnSplit function as input

Question

I have a requirement to use a comma seperated string (which is a value in a table column) in \'IN\' clause of an SQL statement(SQL server 2008) For this I am using below sp

Answer 1

Why not try it this way

declare @Prefix2Include as Varchar(500)

SELECT  @Prefix2Include = Prefix2Include FROM dbo.vw_PrefixToInclude

select * from dbo.fnSplit(@Prefix2Include , ',')

Update

Select * From @t v 
Where v.EmpPrefix IN 
(select * from dbo.fnSplit(@Prefix2Include, ','))