text: --
  --    Copyright 2009-2019 the original author or authors.
  --
  --    Licensed under the Apache License, Version 2.0 (the "License");
  --    you may not use this file except in compliance with the License.
  --    You may obtain a copy of the License at
  --
  --       http://www.apache.org/licenses/LICENSE-2.0
  --
  --    Unless required by applicable law or agreed to in writing, software
  --    distributed under the License is distributed on an "AS IS" BASIS,
  --    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  --    See the License for the specific language governing permissions and
  --    limitations under the License.
  --
  
  DROP TABLE articles IF EXISTS;
  DROP TABLE authors IF EXISTS;
  
  CREATE TABLE articles
  (
      id        INT,
      title     VARCHAR(20),
      author_id INT
  );
  
  CREATE TABLE authors
  (
      id   INT,
      name VARCHAR(20)
  );
  
  INSERT INTO articles (id, title, author_id)
  VALUES (1, 'Article1', 100),
         (2, 'Article2', 200);
  
  INSERT INTO authors (id, name)
  VALUES (100, 'Author1'),
         (200, 'Author2');
  