Ako písať vložiť dotaz pre cudzí kľúč v sql server

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cudzí kľúč v php

CREATE TABLE IF NOT EXISTS Orders (
    OrderID int NOT NULL,
    OrderNumber int NOT NULL,
    PersonID int,
    PRIMARY KEY (OrderID),
    CONSTRAINT FK_PersonOrder FOREIGN KEY (PersonID)
    REFERENCES Persons(PersonID)
);

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