Query
CREATE TABLE "OrderItem" (
"id" integer PRIMARY KEY,
"order_id" integer NOT NULL REFERENCES "Order" ("id"),
"reward_id" integer NOT NULL REFERENCES "Reward" ("id"),
"quantity" integer NOT NULL,
"unit_price" integer NOT NULL,
"line_subtotal" integer NOT NULL,
"line_shipping_total" integer NOT NULL,
"line_total" integer NOT NULL
)