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alter foreign key

ALTER TABLE Employee
ADD FOREIGN KEY (DeptNo) REFERENCES Department(DeptNo);
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Add foreign key to existing table

ALTER TABLE message ADD FOREIGN KEY (sender) REFERENCES users;
Comment

Add foreign key to existing table

ALTER TABLE message ADD FOREIGN KEY (sender) REFERENCES users;
Comment

Add foreign key to existing table

ALTER TABLE message ADD FOREIGN KEY (sender) REFERENCES users;
Comment

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