Está faltando uma vírgula:
CREATE TABLE dj_abonent
(
nr_klienti int NOT NULL,
emer_klienti varchar2(10),
sasia_cel int, -- this one right here
CONSTRAINT dj_klientID PRIMARY KEY(nr_klienti)
)
CREATE TABLE dj_abonent
(
nr_klienti int NOT NULL,
emer_klienti varchar2(10),
sasia_cel int, -- this one right here
CONSTRAINT dj_klientID PRIMARY KEY(nr_klienti)
)