Thank you,
Razzak
---- "A. Razzak Memon" <[EMAIL PROTECTED]> wrote:
> At 06:47 AM 3/2/2008, [EMAIL PROTECTED] wrote:
>
> >I notices that in table Levels-there is a PFK key. When would that be used?
>
> For a better understanding of PRIMARY and FOREIGN KEYS in R:BASE, refer to:
>
> From The Edge: http://www.razzak.com/fte/
>
> Topic: All About Constraints in R:BASE (08/21/2006):
>
> . Types and Definitions
> . Primary Key
> . Foreign Key
> . Not Null
> . Unique Key
> . Benefits of Constraints
> . Adding CASCADE to Maintain Primary/Foreign Key Relationship
> . Defining Constraints
> . Listing Constraints
> . LIST CONSTRAINTS
> . LIST PKEYS
> . LIST PKEYS for tablename
> . LIST FKEYS
> . LIST FKEYS for tablename
> . LIST UKEYS
> . LIST UKEYS for tablename
> . Removing Constraints
> . Customizing Constraint Violation Messages
>
> Additional Topics:
>
> . Using Enhanced CASCADE Options in R:BASE (05/21/2007)
> . Indexing Explained (06/20/2007)
>
> Very Best R:egards,
>
> Razzak.
>
> --- RBASE-L
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