Can the field have NULL values?

>Hi,
>
>If I want to exclude empty records from a query for VFP data I would use:
>

>select * from MyTable where !empty( MyField )
>

>
>To do the same for SQL server, the query is:
>

>select * from MyTable where MyField <> ''
>

>
>If I wanted to have one SQL expression that works for both VFP and SQL, I can do the following
>

>select * from MyTable where LEN(rtrim( MyField) ) > 0
>

>
>Is the above efficient method or there is a better approach?
>
>TIA