Suppose that the table EMPLOYEE has a 1:N relationship to the table PHONE_ NUMBER. Further…

Suppose that the table EMPLOYEE has a 1:N relationship to the table PHONE_ NUMBER. Further suppose that the key of EMPLOYEE is EmployeeID and the columns of PHONE_NUMBER are PhoneNumberID (a surrogate key), AreaCode, LocalNumber, and EmployeeID (a foreign key to EMPLOYEE). Write all SQL statements necessary to redesign this database so that it has just one table. Explain the difference between the result of Project Question 8.51 and the result of this question.

Question 8.51

Suppose that the table EMPLOYEE has a 1:N relationship to the table PHONE_ NUMBER. Further suppose that the primary key of EMPLOYEE is EmployeeID and the columns of PHONE_NUMBER are PhoneNumberID (a surrogate key), AreaCode, LocalNumber, and EmployeeID (a foreign key to EMPLOYEE). Alter this design so that EMPLOYEE has a 1:1 relationship to PHONE_NUMBER. For employees having more than one phone number, keep only the first one.

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