Oracle 18c

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CREATE TABLE Pizza (
pizza_id DECIMAL(12) NOT NULL PRIMARY KEY,
name VARCHAR(32) NOT NULL,
date_available DATE NOT NULL,
price DECIMAL(4,2) NOT NULL
);
CREATE TABLE Topping (
topping_id DECIMAL(12) NOT NULL,
topping_name VARCHAR(64) NOT NULL,
pizza_id DECIMAL(12)
);
ALTER TABLE Topping
ADD CONSTRAINT topping_pk
PRIMARY KEY(topping_id);
ALTER TABLE Topping
ADD CONSTRAINT Topping_pizza_fk
FOREIGN KEY(pizza_id)
REFERENCES Pizza(pizza_id);
INSERT INTO pizza (pizza_id, name, date_available, price)
         VALUES (1, 'Plain', CAST('27-Feb-2021' AS DATE), 6.5);
1 rows affected