Oracle - Sequence

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Examples： 

CREATE SEQUENCE SEQ_READER_ID
MAXVALUE 202299999
START WITH 201900001
INCREMENT BY 1
CACHE 20;

CREATE SEQUENCE SEQ_BOOK_ID
MAXVALUE 99999
START WITH 10001
INCREMENT BY 1
CACHE 20;

Using：

INSERT INTO BOOKS VALUES(SEQ_BOOK_ID.NEXTVAL,'AAAAAA','在馆');
INSERT INTO BOOKS VALUES(SEQ_BOOK_ID.NEXTVAL,'BBBBBB','在馆');
INSERT INTO BOOKS VALUES(SEQ_BOOK_ID.NEXTVAL,'CCCCCC','在馆');
INSERT INTO BOOKS VALUES(SEQ_BOOK_ID.NEXTVAL,'DDDDDD','在馆');
INSERT INTO BOOKS VALUES(SEQ_BOOK_ID.NEXTVAL,'EEEEEE','在馆');