DROP TABLE Numbers;
DROP TABLE Orders;
DROP TABLE Inventory;

CREATE TABLE Numbers (
  item  	INT,
  quantity  INT
);

CREATE TABLE Orders (
  orderID	INTEGER NOT NULL GENERATED ALWAYS AS IDENTITY (START WITH 1, INCREMENT BY 1) PRIMARY KEY,
  itemID	INT,
  quantity  INT
);

CREATE TABLE Inventory(
  itemID	INT NOT NULL PRIMARY KEY,
  quantity	INT NOT NULL
);

INSERT INTO Inventory VALUES (1, 100);

INSERT INTO Numbers
VALUES (1, 10);

INSERT INTO Numbers
VALUES (2, 10);

INSERT INTO Numbers
VALUES (3, 10);

INSERT INTO Numbers
VALUES (4, 10);

INSERT INTO Numbers
VALUES (5, 10);

INSERT INTO Numbers
VALUES (6, 10);

INSERT INTO Numbers
VALUES (7, 10);

INSERT INTO Numbers
VALUES (8, 10);

INSERT INTO Numbers
VALUES (9, 10);

INSERT INTO Numbers
VALUES (10, 10);

INSERT INTO Numbers
VALUES (11, 10);

INSERT INTO Numbers
VALUES (12, 10);

INSERT INTO Numbers
VALUES (13, 10);

INSERT INTO Numbers
VALUES (14, 10);

INSERT INTO Numbers
VALUES (15, 10);

INSERT INTO Numbers
VALUES (16, 10);

INSERT INTO Numbers
VALUES (17, 10);

INSERT INTO Numbers
VALUES (18, 10);

INSERT INTO Numbers
VALUES (19, 10);

INSERT INTO Numbers
VALUES (20, 10);