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NO CHAR(8) PRIMARY KEY,
TITLE VARCHAR2(50) NOT NULL,
AUTHOR VARCHAR2(20) ,
PUBLISH VARCHAR2(20),
PUB_DATE DATE,
PRICE NUMBER(6,2)
);
CREATE TABLE READER(
RNO CHAR(6) PRIMARY KEY,
RNAME VARCHAR2(20) NOT NULL
);
CREATE TABLE BORROW(
NO CHAR(8),
RNO CHAR(6),
BORROW_DATE DATE DEFAULT SYSDATE,
PRIMARY KEY(NO,RNO),
FOREIGN KEY (NO) REFERENCES BOOK(NO),
FOREIGN KEY (RNO) REFERENCES READER(RNO)
);
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¡ö1979: Larry Ellison and friends founded Software Development Laboratories.
¡ö1979: SDL changed its company-name to "Relational Software, Inc." (RSI) and introduced its product Oracle V2 as an early commercially ......