If you want to use an Excel spreadsheet as your ODBC data source, you must:
Create a Defined Name area for the required data. It is the defined name that appears in the table list when you create an entity.
Use a system DSN with the Microsoft Excel driver.
To create a Defined Name area
In Excel, open the spreadsheet that contains the data you want to use.
Select the required data.
From the Insert menu, select Name > Define.
Enter a name for this data source and click OK.