MySQL是一款流行的关系型数据库，在实际的应用中，经常需要建立子父关系图。下面是构建MySQL父子关系图的具体步骤：
1. 创建一个表格，其中包含需要建立关系的所有信息。例如，包含父子关系的员工表格。CREATE TABLE employee (id INT PRIMARY KEY,name VARCHAR(50) NOT NULL,boss_id INT,FOREIGN KEY (boss_id) REFERENCES employee(id));2. 插入数据，添加员工及其上级的信息。INSERT INTO employee VALUES (1, 'John', NULL);INSERT INTO employee VALUES (2, 'Smith', 1);INSERT INTO employee VALUES (3, 'David', 2);INSERT INTO employee VALUES (4, 'Tom', 2);INSERT INTO employee VALUES (5, 'Mary', 1);INSERT INTO employee VALUES (6, 'Linda', 5);3. 编写SQL查询语句，查找父子关系。WITH RECURSIVE subordinates AS (SELECT id, name, boss_id, 0 AS levelFROM employee WHERE boss_id IS NULLUNION ALLSELECT e.id, e.name, e.boss_id, s.level + 1FROM employee e JOIN subordinates s ON s.id = e.boss_id)SELECT id, name, boss_id, levelFROM subordinatesORDER BY level, id;
以上就是在MySQL中构建父子关系图的具体步骤。通过建立表格，插入数据以及编写SQL查询语句，可以快速地查询出父子关系，实现具体的业务需求。
