Try selecting the area of the worksheet you plan to use as your "table", then select INSERT, NAME, DEFINE and give the selected area a name. Type the name and click "Add". That becomes your tablename.
Then point your datasource to that spreadsheet using the Excel driver. Verify the datasource. Note that the spreadsheet should not be open or it won't verify. Say your datasource is "spreadsheet".
Now, suppose you named your selected area "chartdata". The first row should be labels, like "People", "Dogs", "Cats".
Subsequent rows are numbers, "10", "5", "3".
<cfquery datasource="spreadsheet" name="getChartData">
SELECT * FROM chartdata
</cfquery>
<cfoutput query="getChartData">
#People#, #Dogs#, #Cats#
</cfoutput>
would return:
10.0, 5.0, 3.0 John Hoarty
jhoarty@quickestore.com