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You have a database that contains a table named Customer. The customer table contains a column named LastName that has a column definition of varchar(50). An application named App1 reads from the table frequently. You need to change the column definition to nvarchar(100). The solution must minimize the amount of time it takes for App1 to read the data. Which statement should you execute?

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Vendor: Microsoft
Exam Code: 70-461
Exam Name: Querying Microsoft SQL Server 2012

You develop a Microsoft SQL Server 2012 server database that supports an application. The application contains a table that has the following definition:
ItemsInStore int NOT NULL,
ItemsInWarehouse int NOT NULL)
You need to create a computed column that returns the sum total of the ItemsInStore and ItemsInWarehouse values for each row. Which Transact-SQL statement should you use?

A.    ALTER TABLE InventoryADD TotalItems AS ItemsInStore + ItemsInWarehouse
B.    ALTER TABLE InventoryADD ItemsInStore – ItemsInWarehouse = TotalItems
C.    ALTER TABLE InventoryADD TotalItems = ItemsInStore + ItemsInWarehouse
D.    ALTER TABLE InventoryADD TotalItems AS SUM(ItemsInStore, ItemslnWarehouse)