You have a table named dbo.Customers. The table was created by using the following Transact-SQL statement:

CREATE TABLE dbo.Customers
(
CustomerID int IDENTITY(1,1) PRIMARY KEY CLUSTERED,
AccountNumber nvarchar(25) NOT NULL,
FirstName nvarchar(50) NOT NULL,
LastName nvarchar(50) NOT NULL,
AddressLine1 nvarchar(255) NOT NULL,
AddressLine2 nvarchar(255) NOT NULL,
City nvarchar(50) NOT NULL,
StateProvince nvarchar(50) NOT NULL,
Country nvarchar(50) NOT NULL,
PostalCode nvarchar(50) NOT NULL,
CreateDate datetime NOT NULL DEFAULT(GETDATE()),
ModifiedDate datetime NOT NULL DEFAULT(GETDATE())
)

You create a stored procedure that includes the AccountNumber, Country, and StateProvince columns from the dbo.Customers table. The stored procedure accepts a parameter to filter the output on the AccountNumber column. You need to optimize the performance of the stored procedure. You must not change the existing structure of the table. Which Transact-SQL statement should you use?

Your database is 5GB and contains a table named SalesHistory. Sales information is frequently inserted and updated.
You discover that excessive page splitting is occurring.
You need to reduce the occurrence of page splitting in the SalesHistory table.
Which code segment should you use?.

You have a user named John. He has SELECT access to the Sales schema. You need to eliminate John’s SELECT access rights from the Sales.SalesOrder table without affecting his other permissions.
Which Transact-SQL statement should you use?