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Which Transact-SQL query should you use?

You support a database structure shown in the exhibit. (Click the Exhibit button.)

You need to write a query that displays the following details:

• Total sales made by sales people, year, city, and country

• Sub totals only at the city level and country level

• A grand total of the sales amount

Which Transact-SQL query should you use?
A . SELECT SalesPerson.Name, Country, City,
DatePart(yyyy, SaleDate) AS Year, Sum(Amount) AS Total
FROM Sale INNER JOIN SalesPerson
ON Sale.SalesPersonID = SalesPerson.SalesPersonID
GROUP BY GROUPING SETS((SalesPerson.Name, Country, City, DatePart(yyyy,
SaleDate)), (Country, City), (Country), ())

B . SELECT SalesPerson.Name, Country, City,
DatePart(yyyy, SaleDate) AS Year, Sum(Amount) AS Total
FROM Sale INNER JOIN SalesPerson
ON Sale.SalesPersonID = SalesPerson.SalesPersonID
GROUP BY CUBE(SalesPerson.Name, Country, City, DatePart(yyyy, SaleDate))
C . SELECT SalesPerson.Name, Country, City,
DatePart(yyyy, SaleDate) AS Year, Sum(Amount) AS Total
FROM Sale INNER JOIN SalesPerson
ON Sale.SalesPersonID = SalesPerson.SalesPersonID
GROUP BY CUBE(SalesPerson.Name, DatePart(yyyy, SaleDate), City, Country)
D . SELECT SalesPerson.Name, Country, City,
DatePart(yyyy, SaleDate) AS Year, Sum(Amount) AS Total
FROM Sale INNER JOIN SalesPerson
ON Sale.SalesPersonID = SalesPerson.SalesPersonID
GROUP BY ROLLUP(SalesPerson.Name, DatePart(yyyy, SaleDate), City, Country)

Answer: A

Explanation:

Be careful with this question, because on exam can be different options for answer.

And none of them is correct: D You should report this question.

Reference: http://www.grapefruitmoon.net/diving-into-t-sql-grouping-sets/

Reference: http://msdn.microsoft.com/en-us/library/ms177673.aspx

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