How To Create A File With Header, Details & Footer

Hi All,

I need to create a query which gives me something like this

HH20060831160342
DDasb IT 3000
FF20060831160709000000001


Where 'HH' is the header(followed by Date and time) and 'FF' is the footer (followed by Date, time and no of records)and 'DD' has some details (few fields) from database.I am using UNION to get this result but the problem is that if the count in the footer is 0 then query should not give any output.but If I am using the following query
select 'HH'+convert(varchar,getDATE(),112)+replace(convert(varchar,getdate(),8),':','') as filename,'' as name,'' as dept,'' as sal
union all
select 'DD'+'',filename,dept,sal from emp where empno like '%1%'
union all
select 'FF'+convert(varchar,getDATE(),112)+replace(convert(varchar,getdate(),8),':','')+ REPLICATE(0, 9-len(COUNT(*)))+''+convert(VARchar(10),COUNT(*)) as filename,'' as name,'' as dept,'' as sal from emp where empno like '%1%'

I am getting the result as


HH20060831161226
FF20060831161226000000000
if the second select statement has no records

Please help