Môžem tabuľky majú viacero primárny kľúč

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primárny kľúč viac

CREATE TABLE IF NOT EXISTS Persons (
    Rollno int NOT NULL,
    FirstName varchar(30),
    LastName varchar(30) NOT NULL,
    class varhcar(20),
    Age int,
    CONSTRAINT PK_Student PRIMARY KEY (Rollno,LastName)
);

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