การสร้างโมเดลข้อมูลแบบเครือข่าย

CREATE TABLE Trip (   
    -- Define the Departure
  	___ VARCHAR(255) ___ ___,
    BusName VARCHAR(255) NOT NULL,
    -- Define the Destination
    ___ VARCHAR(255) ___ ___,
);

-- Insert a route from San Francisco to New York
___ ___ ___ VALUES ( ___ , ___ , ___);
-- Insert a route from Florida to San Francisco
___ ___ ___ VALUES ( ___, ___ , ___);
INSERT INTO Trip VALUES ( 'San Francisco', 'Bus 2','Texas');
INSERT INTO Trip VALUES ( 'San Francisco', 'Bus 3','Florida');
INSERT INTO Trip VALUES ( 'San Francisco', 'Bus 4','Washington');
INSERT INTO Trip VALUES ( 'New York', 'Bus 5','Texas');
INSERT INTO Trip VALUES ( 'New York', 'Bus 6','Washington');
INSERT INTO Trip VALUES ( 'Florida', 'Bus 7','New York');
INSERT INTO Trip VALUES ( 'Florida', 'Bus 8','Toronto');

-- Get all possible departure locations
SELECT ___ ___ 
FROM ___;