OF is a throwaway connective that can be used in an INFO/ACCESS query to make it sound more like an English-language sentence. It has no effect.
Example
These two statements produce the same report:
>SORT ORDERS BY THE DATE BREAK-ON THE DATE TOTAL OF THE AMOUNT |
>SORT ORDERS BY DATE BREAK-ON DATE TOTAL AMOUNT |
The THE and OF connectives are ignored in the first statement.
See Also