sql - Varying RI Constraints between 3 tables. How does deletion in table A affect table C? -

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please refer below image,

enter image description here

manager attribute refers id attribute in employee table , project refers code attribute in project table.

suppose manager has on delete cascade , project attribute has on delete restrict. happen if deleted employee manager project in potential customers table?

oracle go down chain of references , stop on on "ora-02292: integrity constraint (.) violated - child record found" if finds "restricted" foreign key constraint.

if fk constraints in chain defined "cascade", rows in project associated manager ids matching deleted rows in employee deleted , similarly, rows in potential_customers having project ids deleted in project deleted.


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