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²Ù×÷²½Ö裺Create DataBase M14130112£» 2.´ò¿ª¸Õ¸Õ´´½¨µÄÊý¾Ý¿â ²Ù×÷²½Ö裺Use M14130112
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±íÖÐÊý¾ÝÒ²¿ÉÒÔ×Ô¼ºÉè¼Æ ѧÉú ѧºÅ S1 S2 S3 S4 S5 ¿Î³Ì
ÐÕÃû WANG LIU CHEN WU LI ÄêÁä 20 19 22 19 21 ÐÔ±ð M F M M F ¿Î³ÌºÅ C2 C4 C3 C1 C5 Ñ¡¿Î ѧºÅ S1 S2 S3 S1 S4 S5 S2
use M14130112; create table s
¿Î³ÌÃû MATHS PHYSICS C DB 0S ѧʱ 64 48 32 48 32 ѧ·Ö 4 3 2 3 2 ¿Î³ÌÐÔÖÊ »ù´¡ »ù´¡ רҵ»ù´¡ רҵ רҵ
¿Î³ÌºÅ C2 C1 C2 C5 C3 C4 C4 ³É¼¨ 89 70 NULL 80 NULL 78 79 (sno char(20) not null unique, sname char(20), age int, sex char(1), primary key(sno)); create table c (cno char(20), cname char(20), chour int, credit int, ctype char(20), primary key(cno)); create table sc (sno char(20), cno char(20) , grade int,
primary key(sno,cno),
foreign key(sno) references s(sno), foreign key(cno) references c(cno)); insert into s values('S1','WANG',20,'M'); insert into s values('S2','LIU',19,'F'); insert into s values('S3','CHEN',22,'M'); insert into s values('S4','WU',19,'M');