text: use phones;
  
  CREATE TABLE phone (number VARCHAR(100) NOT NULL, PRIMARY KEY (number));
  
  INSERT INTO phone VALUES("1234567890");
  INSERT INTO phone VALUES("123 456 7891");
  INSERT INTO phone VALUES("(123) 456 7892");
  INSERT INTO phone VALUES("(123) 456-7893");
  INSERT INTO phone VALUES("123-456-7894");
  INSERT INTO phone VALUES("123-456-7890");
  INSERT INTO phone VALUES("1234567892");
  INSERT INTO phone VALUES("(123)456-7892");
  
  