SQL: multi valued attributes

Question

I created a table that contains information about a company. One attribute is their telephone number. A company can have many telephone numbers.

How do I create mul

Answer 1

In a separate table like:

CREATE TABLE Company
(
  Id int identity primary key, 
  Name nvarchar(100) not null UNIQUE --UNIQUE is optional
)
GO
CREATE TABLE CompanyPhones
(
  Id int identity primary key, 
  Phone nvarchar(100) not null, 
  CompanyId int NOT NULL REFERENCES Company(Id) ON DELETE CASCADE
)

How to use these structures:

SELECT CompanyPhones.Phone
FROM Company
JOIN CompanyPhones
  ON Company.Id = CompanyPhones.CompanyId
WHERE Company.Name=N'Horns and Hoogs Ltd.'