Sequences in Oracle

CREATE TABLE Samples

(

 SampID     NUMBER(4)

 Constraint SampID_PK PRIMARY  KEY,

 SampName   VARCHAR2(25),

 SampDate   DATE

 );

CREATE SEQUENCE SampleSeq

INCREMENT By 1

START WITH 0

MINVALUE 0

MAXVALUE 5

NOCACHE

NOCYCLE

INSERT INTO Samples

(SampID, SampName,  SampDate)

VALUES

(SampleSeq.NEXTVAL, 'SAMPLE', '31-AUG-05');

SELECT * FROM Samples;

CREATE TABLE SampleCy

(

 SampID     NUMBER(4)

 Constraint SampIDD_PK PRIMARY  KEY,

 SampName   VARCHAR2(25),

 SampDate   DATE

 );

CREATE SEQUENCE SampSeqC

INCREMENT By 1

START WITH 0

MINVALUE 0

MAXVALUE 5

NOCACHE

CYCLE

CREATE SEQUENCE SampSeqD

INCREMENT BY -1

START WITH 5

MAXVALUE 5

MINVALUE 0

NOCACHE

NOCYCLE;