CREATE TABLE EMP1
(
  EMP_NO    NUMBER                              NOT NULL,
  EMP_NAME  VARCHAR2(50 BYTE)
)
LOGGING 
NOCOMPRESS 
NOCACHE
NOPARALLEL
MONITORING;


CREATE UNIQUE INDEX EMP1_PK ON EMP1
(EMP_NO)
LOGGING
NOPARALLEL;


ALTER TABLE EMP1 ADD (
  CONSTRAINT EMP1_PK
 PRIMARY KEY
 (EMP_NO));