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Oracle Disable all related foreign keys in oracle

Suppose you have the table T1 and it has relation with many tables and its primary key constraint name is "pk_t1" you want to disable these foreign keys you can use:

 FOR I IN (SELECT table_name, constraint_name FROM user_constraint t WHERE
r_constraint_name='pk_t1') LOOP
EXECUTE IMMEDIATE ' alter table ' || I.table_name || ' disable constraint ' || i.constraint_name;


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