0 - 2 of 2 tags for Foreign

I'm logged in with dbc user.
I'm ALTERing a table to add Foreign Key Constraint with Following statement
ALTER TABLE testdb.Master2 ADD CONSTRAINT fk_Master1 FOREIGN KEY (Master1ID) REFERENCES testdb.Master1(Master1ID);
its works fine.
But when i write this in a procedure

I want to Update a table. But before that i want disable foreign key\check Constraint\Unique Key on some tables.
After update, i want to enable those disables constraint again.
Can you please tell me how can i do that.