拉威尔的口才是多对多，有很多关系

CREATE TABLE Students (
    StudentID INT PRIMARY KEY,
    Name VARCHAR(100)
);

CREATE TABLE Courses (
    CourseID INT PRIMARY KEY,
    Title VARCHAR(100)
);

CREATE TABLE Enrollments (
    EnrollmentID INT PRIMARY KEY,
    StudentID INT,
    CourseID INT,
    FOREIGN KEY (StudentID) REFERENCES Students(StudentID),
    FOREIGN KEY (CourseID) REFERENCES Courses(CourseID)
);

INSERT INTO Students (StudentID, Name) VALUES (1, 'Alice');
INSERT INTO Students (StudentID, Name) VALUES (2, 'Bob');

INSERT INTO Courses (CourseID, Title) VALUES (101, 'Mathematics');
INSERT INTO Courses (CourseID, Title) VALUES (102, 'History');

INSERT INTO Enrollments (EnrollmentID, StudentID, CourseID) VALUES (1, 1, 101);
INSERT INTO Enrollments (EnrollmentID, StudentID, CourseID) VALUES (2, 1, 102);
INSERT INTO Enrollments (EnrollmentID, StudentID, CourseID) VALUES (3, 2, 101);