>Hi,
> I am having Customer ID as primary key for my customer table. I found that, it is slow for searching a customer record using either LOCATE FOR or SQL-SELECT. Therefore, I set Customer ID as regular key in table as well. It really optimized the query. The speed of search is just like "light of speed".
>
>Why could it happen?
>
>Thank you


It could be that the regular key is closer to the physical order of the data. You might try to SORT the file on the PK.