MySQL分班系統是一種基于MySQL數據庫的學生分班系統。該系統可以方便地對學生進行分班和管理，同時也可以提供實時的學生信息查詢和統計功能。

對于這種基于數據庫的系統，我們需要首先創建數據庫和相應的表格。下面是創建數據庫和表格的代碼：

CREATE DATABASE class_system;
USE class_system;
CREATE TABLE students (
id INT(11) NOT NULL AUTO_INCREMENT,
name VARCHAR(50) NOT NULL,
gender VARCHAR(10),
age INT(11),
class_id INT(11) NOT NULL,
PRIMARY KEY (id)
);
CREATE TABLE classes (
id INT(11) NOT NULL AUTO_INCREMENT,
name VARCHAR(50) NOT NULL,
PRIMARY KEY (id)
);

然后，我們需要填充數據并進行分班操作。下面是填充數據和分班的代碼：

INSERT INTO students (name, gender, age, class_id) VALUES
('John', 'Male', 18, 1),
('Jane', 'Female', 17, 1),
('Tom', 'Male', 18, 2),
('Lucy', 'Female', 17, 2),
('Mike', 'Male', 18, 3),
('Lily', 'Female', 17, 3),
('Jack', 'Male', 18, 4),
('Mia', 'Female', 17, 4);
UPDATE students SET class_id = 1 WHERE gender = 'Male' AND age >= 18;
UPDATE students SET class_id = 2 WHERE gender = 'Female' AND age >= 18;
UPDATE students SET class_id = 3 WHERE gender = 'Male' AND age< 18;
UPDATE students SET class_id = 4 WHERE gender = 'Female' AND age< 18;

最后，我們可以通過SQL語句查詢學生信息和統計班級信息：

SELECT * FROM students;
SELECT classes.name, COUNT(students.id) as student_num FROM students
JOIN classes ON classes.id = students.class_id
GROUP BY classes.id;

MySQL分班系統的實現過程并不復雜，但它可以大大提高學生分班和管理的效率。對于學生和學校來說，這是一個非常實用和有價值的工具。