Which Transact-SQL query should you use?

You develop a Microsoft SQL Server 2012 database that contains a table named Customers.

The Customers table has the following definition:

You need to create an audit record only when either the MobileNumber or HomeNumber column is updated.

Which Transact-SQL query should you use?
A . CREATE TRIGGER TrgPhoneNumberChange
ON Customers FOR UPDATE
AS
IF COLUMNS_UPDATED (HomeNumber, MobileNumber)
– – Create Audit Records
B . CREATE TRIGGER TrgPhoneNumberChange
ON Customers FOR UPDATE
AS
IF EXISTS( SELECT HomeNumber from inserted) OR
EXISTS (SELECT MobileNumber FROM inserted)
– – Create Audit Records
C . CREATE TRIGGER TrgPhoneNumberChange
ON Customers FOR UPDATE
AS
IF COLUMNS_CHANGED (HomeNumber, MobileNumber)
– – Create Audit Records
D . CREATE TRIGGER TrgPhoneNumberChange
ON Customers FOR UPDATE
AS
IF UPDATE (HomeNumber) OR UPDATE (MobileNumber)
– – Create Audit Records

View Answer

Answer: D

Explanation:

Reference: http://msdn.microsoft.com/en-us/library/bb510663.aspx

Reference: http://msdn.microsoft.com/en-us/library/ms186329.aspx