将以下代码给为mysql代码：create table student(sno char(5) primary key, sname varchar(20), sage int, ssex char(2), sdept char(15)); create table course(cno char(3) primary key, cname varchar(20), cpno char(3), ccredit int, foreign key(cpno) references course); create table sc( sno char(5), cno char(3), grade int, primary key(sno,cno), foreign key(sno) references student, foreign key(cno) references course, check(grade>=0 and grade<=100));

以下是对应的 MySQL 代码：

-- Connect to the database
mysql -h hostname -u username -p password

-- Create the student table
CREATE TABLE student (
    sno CHAR(5) PRIMARY KEY,
    sname VARCHAR(20),
    sage INT,
    ssex CHAR(2),
    sdept CHAR(15)
);

-- Create the course table
CREATE TABLE course (
    cno CHAR(3) PRIMARY KEY,
    cname VARCHAR(20),
    cpno CHAR(3),
    ccredit INT,
    FOREIGN KEY (cpno) REFERENCES course (cno)
);

-- Create the sc table
CREATE TABLE sc (
    sno CHAR(5),
    cno CHAR(3),
    grade INT,
    PRIMARY KEY (sno, cno),
    FOREIGN KEY (sno) REFERENCES student (sno),
    FOREIGN KEY (cno) REFERENCES course (cno),
    CHECK (grade >= 0 AND grade <= 100)
);

-- Close the connection
QUIT;

需要注意的是，在 MySQL 中，`CHECK` 约束不能使用函数，只能使用常量表达式。因此，`CHECK(grade >= 0 AND grade <= 100)` 不能写成 `CHECK(BETWEEN grade AND 0 AND 100)`。