Import data.sql MySQL Docker Container

If I have a data.sql, how I can import database to my mysql docker container? How I can import database data. In a dockerised world this adds a layer of complexity. some methods please. Here my docker-compose.yml: nginx: build: ./nginx/ container_name: nginx-container ports: - 80:80 links: - php volumes_from: - app-data php: build: ./php/ container_name: php-container expose: - 9000 links: - mysql volumes_from: - app-data app-data: image: php:7.0-fpm container_name: app-data-container volumes: - ./www/html/:/var/www/html/ command: "true" mysql: image: mysql:latest container_name: mysql-container ports: - 3306:3306 volumes_from: - mysql-data environment: MYSQL_ROOT_PASSWORD: secret MYSQL_DATABASE: name_db MYSQL_USER: user MYSQL_PASSWORD: password mysql-data: image: mysql:latest container_name: mysql-data-container volumes: - /var/lib/mysql command: "true"