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Question 1:

You have a database that stores information about server and application errors. The database contains the following table: Servers

Errors

You need to return all unique error log messages and the server where the error occurs most often. Which Transact-SQL statement should you run?

A. B. C. D.

Correct Answer: A

Question 2:

You have a database named DB1 that contains a temporal table named Sales.Customers.

You need to create a query that returns the credit limit that was available to each customer in DB1 at the beginning of 2017.

Which query should you execute?

A. B. C. D.

Correct Answer: C

AS OF: Returns a table with a rows containing the values that were actual (current) at the specified point in time in the past.

Incorrect Answers:

A, B: CONTAINED IN has two parameters: CONTAINED IN ( , )

References: https://docs.microsoft.com/en-us/sql/relational-databases/tables/querying-data-in-a-system-versioned-temporal-table

Question 3:

DRAG DROP

You have a database that includes the following tables:

You need to create a list of all customer IDs and the date of the last order that each customer placed. If the customer has not placed any orders, you must return the date January 1, 1900. The column names must be CustomerID and LastOrderDate.

Which four Transact-SQL segments should you use to develop the solution? To answer, move the appropriate Transact-SQL segments from the list of Transact-SQL segments to the answer area and arrange them in the correct order.

Select and Place:

Correct Answer:

Box 1: SELECT..COALESCE…

The COALESCE function evaluates the arguments in order and returns the current value of the first expression that initially does not evaluate to NULL.

Box 2: ..LEFT OUTER JOIN..

The LEFT JOIN (LEFT OUTER JOIN) keyword returns all rows from the left table (table1), with the matching rows in the right table (table2). The result is NULL in the right side when there is no match. A customer might have no orders so the

right table must be allowed have a NULL value.

Box 3: ON c.custid = o.custid

We JOIN on the custID column, which is available in both tables.

Box 4: GROUP BY c.custid

References:

https://technet.microsoft.com/en-us/library/ms189499(v=sql.110).aspx

http://www.w3schools.com/sql/sql_join_left.asp

Question 4:

SIMULATION

You create a table named Products.Sales by running the following Transact-SQL statement:

You add the following data to the table.

You are developing a report to display monthly sales data.

You need to create a Transact-SQL query to meet the following requirements: Retrieve a column for the year followed by a column for each month from January through December. Include the total sales amount for each month. Aggregate columns by year, month, and then amount.

Construct the query using the following guidelines: Use the MONTH keyword as the interval when using the DATANAME function. Do not modify the provided IN clause. Do not surround object names with square brackets. Do not use implicit joins. Do not use the DATEPART function.

Part of the correct Transact-SQL has been provided in the answer area below. Enter the code in the answer area that resolves the problem and meets the stated goals or requirements. You can add code within the code that has been provided as well as below it.

1.

SELECT * FROM

2.

(SELECT YEAR(SalesData)) AS Year, DATENAME (MONTH, SalesDate) AS Month, SalesAmount AS Amount

3.

4.

) AS MonthlySalesData

5.

6.

FOR Month IN (January, February, March, April, May, June, July, August, September, October, November, December)) AS MonthNamePivot

Correct Answer: explanation

Please see explanation

1 SELECT * FROM

2 (SELECT YEAR(SalesData)) AS Year, DATENAME (MONTH, SalesDate) AS Month, SUM(SalesAmount) AS Amount

3 FROM Products.Sales GROUP BY Year, Month

4 ) AS MonthlySalesData

5 PIVOT SUM(Amount)

6 FOR Month IN (January, February, March, April, May, June, July, August, September, October, November, December))

AS MonthNamePivot

Note:

Line 2: Add SUM( ) around SalesAmount

Line 3: Add: FROM Products.Sales GROUP BY Year, Month

Line 5: Add: PIVOT SUM(Amount)

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