DROP TABLE IF EXISTS Results;
DROP TABLE IF EXISTS Calculations;
DROP TABLE IF EXISTS People;

CREATE TABLE IF NOT EXISTS `Calculations` (
    id INTEGER PRIMARY KEY AUTOINCREMENT, `age` INTEGER, 
    years INTEGER, `nextage` INTEGER);

CREATE TABLE IF NOT EXISTS `People` (
    id INTEGER PRIMARY KEY AUTOINCREMENT, 
    name VARCHAR(255));

CREATE TABLE IF NOT EXISTS `Results` (
    id INTEGER PRIMARY KEY AUTOINCREMENT, 
    calculationId INTEGER REFERENCES `Calculations` (`id`) 
        ON DELETE CASCADE ON UPDATE CASCADE, 
    personId INTEGER REFERENCES `People` (`id`) 
        ON DELETE CASCADE ON UPDATE CASCADE);

INSERT INTO Calculations (id, age, years, nextage) VALUES
    (1, 35, 5, 40), (2, 35, 10, 45);

INSERT INTO People (id, name) VALUES
    (1, 'Alice'), (2, "Bob");
    
INSERT INTO Results (calculationId, personId) VALUES
    (1, 1), (2, 2), (2, 1);