Disable foreign key : FOREIGN KEY « Table « Oracle PL/SQL Tutorial

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Oracle PL/SQL Tutorial » Table » FOREIGN KEY

6. 16. 9. Disable foreign key


SQL>

SQL> create table it

  2   (c1 number primary key,

  3    c2 number,

  4    c3 number);







SQL>

SQL> alter table it add constraint it_fk foreign key (c2) references emp disable;







SQL>

SQL>

SQL> select object_name as name, object_id

  2  from user_objects

  3  where object_name in ('T', 'IT');



IT                                                                                                                            14971



1 row selected.

6. 16. FOREIGN KEY
	6. 16. 1.	Adding a FOREIGN KEY Constraint
	6. 16. 2.	ON DELETE CASCADE clause with a FOREIGN KEY constraint
	6. 16. 3.	Use the ON DELETE SET NULL clause with a FOREIGN KEY constraint
	6. 16. 4.	ORA-02298: cannot validate (JAVA2S.PRODUCT_ORDER_FK_PRODUCT) - parent keys not found
	6. 16. 5.	A foreign key to reference itself
	6. 16. 6.	ORA-02270: no matching unique or primary key for this column-list
	6. 16. 7.	Add constraint foreign key references
	6. 16. 8.	Violate a foreign key
	6. 16. 9.	Disable foreign key
	6. 16. 10.	Many to many using a primary-key and foreign-key relationship

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