diff --git a/mysql.sql b/mysql.sql
index 1465180..f64594b 100644
--- a/mysql.sql
+++ b/mysql.sql
@@ -88,7 +88,7 @@ CREATE TABLE attendance_records
     date       DATE NOT NULL,
     status     ENUM('present', 'absent', 'late', 'excused'),
     FOREIGN KEY (course_id) REFERENCES course (course_id),
-    FOREIGN KEY (student_id) REFERENCES students (student_id)
+    FOREIGN KEY (student_id) REFERENCES student (student_id)
 );
 
 
@@ -156,18 +156,39 @@ VALUES ('教师1', 1),
        ('教师3', 3),
        ('教师4', 4);
 
+CREATE TABLE major_course
+(
+    id        INT AUTO_INCREMENT PRIMARY KEY,
+    major_id  VARCHAR(20) NOT NULL,
+    course_id INT         NOT NULL,
+    FOREIGN KEY (major_id) REFERENCES major (major_id),
+    FOREIGN KEY (course_id) REFERENCES course (course_id)
+);
+
+INSERT INTO major_course (major_id, course_id) VALUES
+ ('000',1),
+ ('000',2),
+ ('000',3),
+ ('000',4),
+ ('000',5),
+ ('000',6),
+ ('000',7),
+ ('000',8);
+
 CREATE TABLE teacher_class_course
 (
-    id         INT AUTO_INCREMENT,
-    teacher_id INT,
-    course_id  INT,
-    class_id   INT,
+    id             INT AUTO_INCREMENT,
+    teacher_number VARCHAR(20) NOT NULL,
+    course_id      INT         NOT NULL,
+    class_name     VARCHAR(20) NOT NULL,
     PRIMARY KEY (id),
-    FOREIGN KEY (teacher_id) REFERENCES teacher (teacher_id),
-    FOREIGN KEY (course_id) REFERENCES course (course_id),
-    FOREIGN KEY (class_id) REFERENCES class (class_id)
+    FOREIGN KEY (teacher_number) REFERENCES teacher (teacher_number),
+    FOREIGN KEY (course_id) REFERENCES course (course_id)
 );
 
+INSERT INTO teacher_class_course(teacher_number, course_id, class_name) VALUES
+('G0000',1,'2023级01班');
+
 INSERT INTO teacher_class_course(teacher_id, course_id, class_id)
 VALUES (1, 1, 1),
        (1, 2, 1),