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Question 1:

Your database contains two tables named DomesticSalesOrders and InternationalSalesOrders. Both tables contain more than 100 million rows. Each table has a Primary Key column named SalesOrderId. The data in the two tables is distinct from one another. Business users want a report that includes aggregate information about the total number of global sales and total sales amounts. You need to ensure that your query executes in the minimum possible time. Which query should you use?

A. SELECT COUNT(*) AS NumberOfSales, SUM(SalesAmount) AS TotalSalesAmount FROM (SELECT SalesOrderId, SalesAmountFROM DomesticSalesOrders UNION ALL SELECT SalesOrderId, SalesAmountFROM InternationalSalesOrder s ) AS p

B. SELECT COUNT(*) AS NumberOfSales, SUM(SalesAmount) AS TotalSalesAmount FROM (SELECT SalesOrderId, SalesAmountFROM DomesticSalesOrders UNION SELECT SalesOrderId, SalesAmountFROM InternationalSalesOrder s ) AS p

C. SELECT COUNT(*) AS NumberOfSales, SUM(SalesAmount) AS TotalSalesAmountFROM DomesticSalesOrders UNION SELECT COUNT(*) AS NumberOfSales, SUM(SalesAmount) AS TotalSalesAmountFROM InternationalSalesOrders

D. SELECT COUNT(*) AS NumberOfSales, SUM(SalesAmount) AS TotalSalesAmountFROM DomesticSalesOrders UNION ALL SELECT COUNT(*) AS NumberOfSales, SUM(SalesAmount) AS TotalSalesAmountFROM InternationalSalesOrders

Correct Answer: A

http://msdn.microsoft.com/en-us/library/ms180026.aspx http://blog.sqlauthority.com/2009/03/11/sql-server-difference-between-union-vs-union-all-optimal- performance- comparison/


Question 2:

You are a database developer of a Microsoft SQL Server 2012 database. You are designing a table that will store Customer data from different sources. The table will include a column that contains the CustomerID from the source system and a column that contains the SourceID. A sample of this data is as shown in the following table. You need to ensure that the table has no duplicate CustomerID within a SourceID. You also need to ensure that the data in the table is in the order of SourceID and then CustomerID. Which Transact- SQL statement should you use?

A. CREATE TABLE Customer (SourceID int NOT NULL IDENTITY, CustomerID int NOT NULL IDENTITY, CustomerName varchar(255) NOT NULL);

B. CREATE TABLE Customer (SourceID int NOT NULL, CustomerID int NOT NULL PRIMARY KEY CLUSTERED, CustomerName varchar(255) NOT NULL);

C. CREATE TABLE Customer (SourceID int NOT NULL PRIMARY KEY CLUSTERED, CustomerID int NOT NULL UNIQUE, CustomerName varchar(255) NOT NULL);

D. CREATE TABLE Customer (SourceID int NOT NULL, CustomerID int NOT NULL, CustomerName varchar(255) NOT NULL,

CONSTRAINT PK_Customer PRIMARY KEY CLUSTERED

(SourceID, CustomerID));

Correct Answer: D


Question 3:

You administer a Microsoft SQL Server 2012 database. The database contains a table named Employee. Part of the Employee table is shown in the exhibit.

Confidential information about the employees is stored in a separate table named EmployeeData. One record exists within EmployeeData for each record in the Employee table. You need to assign the appropriate constraints and table properties to ensure data integrity and visibility. On which column in the Employee table should you a create a unique constraint?

A. DateHired

B. DepartmentID

C. EmployeelD

D. EmployeeNum

E. FirstName

F. JobTitle

G. LastName

H. MiddleName

I. ReportsToID

Correct Answer: D


Question 4:

You are developing a database that will contain price information. You need to store the prices that include a fixed precision and a scale of six digits. Which data type should you use?

A. Float

B. Money

C. Smallmoney

D. Numeric

Correct Answer: D

Numeric is the only one in the list that can give a fixed precision and scale.

http://msdn.microsoft.com/en-us/library/ms179882.aspx


Question 5:

You use a Microsoft SQL Server 2012 database that contains a table named BlogEntry that has the following columns. Id is the Primary Key. You need to append the “This is in a draft stage” string to the Summary column of the recent 10 entries based on the values in EntryDateTime. Which Transact-SQL statement should you use?

A. UPDATE TOP(10) BlogEntry SET Summary.WRITE(N\’ This is in a draft stage\’, NULL, 0)

B. UPDATE BlogEntry SET Summary = CAST(N\’ This is in a draft stage\’ as nvarchar(max)) WHERE Id IN(SELECT TOP(10) Id FROM BlogEntry ORDER BY EntryDateTime DESC)

C. UPDATE BlogEntry SET Summary.WRITE(N\’ This is in a draft stage\’, NULL, 0) FROM ( SELECT TOP(10) Id FROM BlogEntry ORDER BY EntryDateTime DESC) AS s WHERE BlogEntry.Id = s.ID

D. UPDATE BlogEntrySET Summary.WRITE(N\’ This is in a draft stage\’, 0, 0) WHERE Id IN(SELECT TOP(10) Id FROM BlogEntry ORDER BY EntryDateTime DESC)

Correct Answer: C

According to the append possibility of .Write method when offset is specified as NULL. https://msdn.microsoft.com/en-us/library/ms177523.aspx


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Question 6:

You are a database developer of a Microsoft SQL Server 2012 database. The database contains a table named Customers that has the following definition. You need to ensure that the CustomerId column in the Orders table contains only values that exist in the CustomerId column of the Customer table. Which Transact-SQL statement should you use?

A. ALTER TABLE Orders ADD CONSTRAINT FX_Orders_CustomerID FOR EIGN KEY (CustomerId) REFERENCES Customer (CustomerId)

B. ALTER TABLE Customer ADD CONSTRAINT FK_Customer_CustomerID FOR EIGN KEY {Cu3tomerID; REFERENCES Orders (CustomerId)

C. ALTER TABLE Orders ADD CONSTRAINT CK_Crders_CustomerID CHECK (CustomerId IN (SELECT CustomerId FROM Customer))

D. ALTER TABLE Customer ADD OrderId INT NOT NULL; ALTER TABLE Customer ADD CONSTRAINT FK_Customer_OrderID FOR EIGN KEY (CrderlD) REFERENCES Orders (CrderlD);

E. ALTER TABLE Orders ADD CONSTRAINT PK Orders CustomerId PRIMARY KEY (CustomerID)

Correct Answer: A

http://msdn.microsoft.com/en-us/library/ms189049.aspx


Question 7:

You administer a Microsoft SQL Server 2012 database named ContosoDb. Tables are defined as shown in the exhibit.

You need to display rows from the Orders table for the Customers row having the CustomerId value set to 1 in the following XML format.

Which Transact-SQL query should you use?

A. SELECT OrderId, OrderDate, Amount, Name, Country FROM Orders INNER JOIN Customers ON Orders.CustomerId = Customers-CustomerId WHERE Customers.CustomerId = 1 FOR XML RAW

B. SELECT OrderId, OrderDate, Amount, Name, Country FROM Orders INNER JOIN Customers ON Orders.CustomerId = Customers.CustomerId WHERE Customers=CustomerId = 1 FOR XML RAW, ELEMENTS

C. SELECT OrderId, OrderDate, Amount, Name, Country

FROM Orders INNER JOIN Customers

ON Orders.CustomerId = Customers.CustomerId

WHERE Customers.CustomerId = 1

FOR XML AUTO

D. SELECT OrderId, OrderDate, Amount, Name, Country FROM Orders INNER JOIN Customers ON Orders.CustomerId – Customers.CustomerId WHERE Customers.CustomerId= 1 FOR XML AUTO, ELEMENTS

E. SELECT Name, Country, OrderId, OrderDate, Amount FROM Orders INNER JOIN Customers ON Orders.CustomerId= Customers.CustomerId WHERE Customers.CustomerId- 1 FOR XML AUTO

F. SELECT Name, Country, Crderld, OrderDate, Amount FROM Orders INNER JOIN Customers ON Orders.CustomerId= Customers.CustomerId WHERE Customers.CustomerId= 1 FOR XML AUTO, ELEMENTS

G. SELECT Name AS \’@Name\’, Country AS \’@Country\’, OrderId, OrderDate, Amount FROM Orders INNER JOIN Customers ON Orders.CustomerId= Customers.CustomerId WHERE Customers.CustomerId= 1 FOR XML PATH (\’Customers\’)

H. SELECT Name AS \’Customers/Name\’, Country AS \’Customers/Country\’, OrderId, OrderDate, Amount FROM Orders INNER JOIN Customers ON Orders.CustomerId= Customers.CustomerId WHERE Customers.CustomerId= 1 FOR XML PATH (\’Customers\’)

Correct Answer: F


Question 8:

You develop a Microsoft SQL Server 2012 database that contains tables named Customers and Orders. The tables are related by a column named CustomerId. You need to create a query that meets the following requirements:

Returns the CustomerName for all customers and the OrderDate for any orders that they have placed.

Results must not include customers who have not placed any orders. Which Transact-SQL query should you use?

A.

SELECT CustomerName, OrderDate FROM Customers LEFT OUTER JOIN Orders ON Customers.CuscomerlD = Orders.CustomerId

B.

SELECT CustomerName, OrderDate FROM Customers RIGHT OUTER JOIN Orders ON Customers.CustomerID = Orders.CustomerId

C.

SELECT CustomerName, OrderDate FROM Customers CROSS JOIN Orders ON Customers.CustomerId = Orders.CustomerId

D.

SELECT CustomerName, OrderDate FROM Customers JOIN Orders ON Customers.CustomerId = Orders.CustomerId

Correct Answer: D

http://msdn.microsoft.com/en-us/library/ms177634.aspx


Question 9:

You are a database developer for an application hosted on a Microsoft SQL Server 2012 server. The database contains two tables that have the following definitions:

Global customers place orders from several countries. You need to view the country from which each customer has placed the most orders. Which Transact-SQL query do you use?

A. SELECT c.CustomerID, c.CustomerName, o.ShippingCountry FROM Customer c INNER JOIN (SELECT CustomerID, ShippingCountry, RANK() OVER (PARTITION BY CustomerID ORDER BY COUNT(OrderAmount) DESC) AS Rnk FROM Orders GROUP BY CustomerID, ShippingCountry) AS o ON c.CustomerID = o.CustomerID WHERE o.Rnk = 1

B. SELECT c.CustomerID, c.CustomerName, o.ShippingCountry FROM (SELECT c.CustomerID, c.CustomerName, o.ShippingCountry, RANK() OVER (PARTITION BY CustomerID ORDER BY COUNT(o.OrderAmount) ASC) AS Rnk FROM Customer c INNER JOIN Orders o

ON c.CustomerID = o.CustomerID

GROUP BY c.CustomerID, c.CustomerName, o.ShippingCountry) cs

WHERE Rnk = 1

C. SELECT c.CustomerID, c.CustomerName, o.ShippingCountry FROM Customer c INNER JOIN (SELECT CustomerID, ShippingCountry, RANK() OVER (PARTITION BY CustomerID ORDER BY OrderAmount DESC) AS Rnk FROM Orders GROUP BY CustomerID, ShippingCountry) AS o ON c.CustomerID = o.CustomerID WHERE o.Rnk = 1

D. SELECT c.CustomerID, c.CustomerName, o.ShippingCountry FROM Customer c INNER JOIN (SELECT CustomerID, ShippingCountry, COUNT(OrderAmount) DESC) AS OrderAmount FROM Orders GROUP BY CustomerID, ShippingCountry) AS o ON c.CustomerID = o.CustomerID ORDER BY OrderAmount DESC

Correct Answer: A


Question 10:

Your manager has asked you to extend one of the complex stored procedures used to calculate time differences between lab test results. In particular, during the stored procedures you need to check the exact minute value of a datatime value. Your manager has suggested that you use the DATENAME function and pass in the date and datepart argument. Which datepart argument should you use to get the minute?

A. m

B. n

C. mcs

D. mm

Correct Answer: B

If you want to get the minute, you can either pass in mi or n as the argument to DATENAME.


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