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CREATE DATABASE teacher ´´½¨Êý¾Ý±í

sno char(10) not null primary key, sex char(2) check(sex in('ÄÐ','Å®')) not null, canme varchar(8) not null , DOB datetime, dept varchar(10), telno char(11) not null, )

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con char(5) not null primary key, cname varchar(10) not null, Cpno char(5),

teacher varchar(8) not null, credit smallint, )

create table SC(

son char(10) not null primary key, con char(5) not null primary key,

score decimal(6,2) check(score in(score<'100'||score>'0')), )

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