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CREATE TABLE Osztalyzatok (Diak_azonosito NUMERIC (4) NOT NULL REFERENCES Diak...
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CREATE TABLE Osztalyzatok(Diak_azonosito NUMERIC (4) NOT NULL REFERENCES Diakok(Diak_azonosito),Tantargy CHAR (20) NOT NULL,Datum DATE NOT NULL,Osztalyzat NUMERIC (1) CHECK (BETWEEN 1 AND 5));
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