Creating Functions

Can someone please explain what the following function does?


Use Master

go

create function dbo.concatenate(@a1 as int)
returns varchar(8000)
as
begin
declare @r varchar(8000)
declare @b1 varchar(1000)
set @r = ''
declare c cursor for
select Notes from heatdb..Accs where ID = @a1

open c

fetch next from c into @b1
while @@FETCH_STATUS = 0
begin
set @r = @r + ' ' + @b1
fetch next from c into @b1
end

close c
deallocate c

return @r
end
go