“Primärschlüssel Mehrfach” Code-Antworten

Primärschlüssel Mehrfach

CREATE TABLE 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)
);