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CREATE TABLE Кассиры( id SERIAL PRIMARY KEY, ФИО_кассира VARCHAR(50) NOT NULL, Возраст INT NOT NULL, Должность varchar(50) NOT NULL ); CREATE TABLE Чеки( id SERIAL PRIMARY KEY, kas_id int, Номер_чека SERIAL, Дата_создания TIMESTAMP(0) DEFAULT NOW(), FOREIGN KEY (kas_id) REFERENCES Кассиры(id) ); INSERT INTO Кассиры(ФИО_кассира, Возраст, Должность) VALUES ('Соловьёв', 34, 'Кассир'), ('Любимова', 25, 'Главный Кассир'); CREATE PROCEDURE Insert_Cheque(cachier VARCHAR(50)) LANGUAGE plpgsql AS $$ DECLARE cachier_id INT; BEGIN SELECT id INTO cachier_id FROM Кассиры WHERE ФИО_кассира = cachier; IF (cachier_id IS NULL) THEN RAISE EXCEPTION 'cachier not exists : %', cachier; END IF; INSERT INTO Чеки(kas_id) VALUES (cachier_id); END; $$; CALL Insert_Cheque('Соловьёв'); CALL Insert_Cheque('Jameson'); SELECT * FROM Чеки;

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