使用Python批量删除MySQL数据库的全部外键

pip install mysql-connector-python

import mysql.connector
 
def delete_foreign_keys(host, port, user, password, database):
    try:
        # 连接到数据库
        conn = mysql.connector.connect(
            host=host,
            port=port,
            user=user,
            password=password,
            database=database
        )
 
        cursor = conn.cursor()
 
        # 查询外键约束
        cursor.execute("""
            SELECT 
                CONSTRAINT_NAME,
                TABLE_NAME
            FROM
                INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS
            WHERE
                UNIQUE_CONSTRAINT_SCHEMA = %s;
        """, (database,))
 
        foreign_keys = cursor.fetchall()
 
        # 生成删除外键约束的 SQL 语句并执行
        for fk in foreign_keys:
            constraint_name, table_name = fk
            cursor.execute(f"ALTER TABLE {table_name} DROP FOREIGN KEY {constraint_name};")
            print(f"Deleted foreign key constraint {constraint_name} from table {table_name}")
 
        conn.commit()
        print("All foreign key constraints deleted successfully!")
 
    except mysql.connector.Error as error:
        print("Error while connecting to MySQL", error)
 
    finally:
        if conn.is_connected():
            cursor.close()
            conn.close()
            print("MySQL connection is closed")
 
# 设置数据库连接参数
host = '127.0.0.1'
port = 3306  # MySQL 默认端口号
user = 'root'
password = 'root'
database = 'mydatabase'
 
# 调用函数删除外键约束
delete_foreign_keys(host, port, user, password, database)