Write an alter statement to add the column area code to, Basic Computer Science

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Write an alter statement to add the column area code to

a. Write an ALTER statement to add the column Area Code to EMPLOYEE. Assume that Area Code is not required.

b. Write an ALTER statement to remove the column Area Code from EMPLOYEE.

c. Write an ALTER statement to make Phone an alternate key in EMPLOYEE.

d. Write an ALTER statement to drop the constraint that Phone is an alternate key in EMPLOYEE.

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Basic Computer Science: Write an alter statement to add the column area code to

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Basic Computer Science: Write an alter statement to add the column area code to

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