CREATE TABLE Teren
(
    TerenID INT,
    Teren INT,
    Adresa nvarchar(50),
    GradID INT,
    KontaktTelefon nvarchar(20),
    CONSTRAINT Teren_pk PRIMARY KEY(TerenID)
);

INSERT INTO Teren VALUES(1,1,'adresa1',123,'0123456789');
INSERT INTO Teren VALUES(2,2,'adresa1',223,'0123456789');
INSERT INTO Teren VALUES(3,3,'adresa1',323,'0123456789');
INSERT INTO Teren VALUES(4,4,'adresa1',423,'0123456789');
INSERT INTO Teren VALUES(5,5,'adresa1',523,'0123456789');
INSERT INTO Teren VALUES(6,6,'adresa1',523,NULL);
INSERT INTO Teren VALUES(7,7,'adresa1',523,NULL);

SELECT * FROM Teren WHERE KontaktTelefon IS NULL ORDER BY Teren DESC;