[1p] table : product attribute : no, name, price table : customer attribute : no, name, sex, age, phone relation : sale N:N cardinality (?) 다대다 카디널리티? ERD를 그릴 것 ***** CREATE TABLE Product( PNO NUMBER(4), PNAME VARCHAR2(15), PRICE NUMBER(8)); CREATE TABLE Customer( CNO NUMBER(4), CNAME VARCHAR2(15), SEX VARCHAR2(1), PHONE VARCHAR2(15)); ***** [2p] ERD는 3개의 테이블로 표시. table : product, customer, sale..
