CREATE TABLE sales.contacts (
id INT PRIMARY KEY IDENTITY,
first_name VARCHAR(100) NOT NULL,
last_name VARCHAR(100) NOT NULL,
phones VARCHAR(500)
);
INSERT INTO sales.contacts (first_name, last_name, phones)
VALUES
('John', 'Doe', '(408)-123-3456,(408)-123-3457'),
('Jane', 'Doe', '(408)-987-4321,(408)-987-4322,(408)-987-4323');
SELECT first_name, last_name, value AS phone
FROM sales.contacts
CROSS APPLY STRING_SPLIT(phones, ',');