Hi jolakammu,
You may try something like the below code:-
<cfquery name = "query_name" dataSource = "db_name">
select * from table_name
</cfquery>
<cfspreadsheet
action = "write"
filename="AgentReport.xls"
query="query_name"
overwrite="true">
<cfform>
<input type="button" value="Report Download" onClick="window.location.href='AgentReport.xls'">
</cfform>
Regards,
Anit Kumar