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 1.ÀûÓÃÏÂÃæµÄ½Å±¾´´½¨BOOK£¬READER ºÍ BORROW ±í£¬²¢Íê³ÉºóÃæµÄÁªÏµ¡£
CREATE TABLE BOOK(
    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)
);
 1).ÀûÓÃSQL Óï¾äʵÏÖÏò BOOK,READER ºÍBORROW ±íÖвåÈëÊý¾Ý£¬²åÈëºó±íÖÐÊý¾ÝÈçÏÂ
BOOK
NO
TITLE
AUTHOR
PUBLISH
PUB_DATE
PRICE
100001
Oracle9iÊý¾Ý¿âϵͳ¹ÜÀí
Àî´úƽ
Ò±½ð¹¤Òµ³ö°æÉç
2003-01-01
38
100002
Oracle9iÖÐÎİæÈëÃÅ
ÕÔËÉÌÎ
ÈËÃñÓʵç³ö°æÉç
2002-07-01
35
100003
Oracle9i¿ª·¢Ö¸ÄÏ
Joan Casteel
µç×Ó¹¤Òµ³ö°æÉç
2004-04-03
49
100004
Êý¾Ý¿âÔ­Àí
Ê¢¶¨Óî
µç×Ó¹¤Òµ³ö°æÉç
2004-03-01
34
100005
Oracle9iÖÐÎİæÊµÓÃÅàѵ
ÕÔ²®É½
µç×Ó¹¤Òµ³ö°æÉç
2002-01-01
21
100006
Oracle9iʵÓý̳Ì
ÎÌÕý¿Æ
µç×Ó¹¤Òµ³ö°æÉç
2003-07-08
38
            READER                                           
RNO
RNAME
200001
ÕÅÈý
200002
Àî·ï
200003
ÃÏÐÀ
200004
л·Ç
200005
ÁõÓ¢
                                           BORROW


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