Visual FoxPro DevCon 2001
Relational Data
uDifferent
tables are related to one another with primary and
foreign key matches.
nEx.
Sales order table holds customer FK
uRelationships
may be:
n(Zero
or) One-to-one
n(Zero
or) One-to-Many
nSelf-join
uRelational
Integrity (RI) can be enforced with triggers, RI Builder, or code
nEx.
Cannot delete invoice with detail items