>>>I want to maximize the speed of performing calculations in related tables. I will be performing a REPLACE on every record in the child table based on values in the Parent record. Any thoughts on the best performers ?
>>>
>>>1) Using Set Relation to 'automate' finding records in child tables
>>>
>>>2) Using Set Filter to 'manually' SKIP thru records in child tables based on Parent key.
>>>
>>>3) Using Scan For in child table based on Parent key.
>>>
>>>4) Using good old fashion Seek in the Child table based on Parent key.
>>
>>Peter;
>>Try to stay away from FILTER as much as possible. In dealing with child records, I usually use the SELECT command and include RECNO() as a column. Then use the record number to point directly to the record in the child table.
>>
>Oh I like this myself!
>SELECT RECNO() AS myfield
>
>Is that what you mean Kia? That's an interesting approach I have never considered before.

Yes Roxanne, but I'd include the aliase when calling RECNO() such as

SELECT RECNO('child')

This has worked for me reliably in FP 2.6 and haven't personaly seen problems with VFP.