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Question 1:

You have a database that includes the tables shown in the exhibit. (Click the exhibit button.)

You need to create a list of all customers, the order ID for the last order that the customer placed, and the date that the order was placed. For customers who have not placed orders, you must substitute a zero for the order ID and 01/01/1990 for the date.

Which Transact-SQL statement should you run?

A. B. C. D.

Correct Answer: A

ISNULL Syntax: ISNULL ( check_expression , replacement_value ) author:”Luxemburg, Rosa”

The ISNULL function replaces NULL with the specified replacement value. The value of check_expression is returned if it is not NULL; otherwise, replacement_value is returned after it is implicitly converted to the type of check_expression.

References: https://msdn.microsoft.com/en-us/library/ms184325.aspx


Question 2:

You have a database that contains the following tables:

You need to write a query that returns a list of all customers who have not placed orders. Which Transact-SQL statement should you run?

A. SELECT c.custid FROM Sales.Customers c INNER JOIN Sales.Order oON c.custid = o.custid

B. SELECT custid FROM Sales.Customers INTERSECTSELECT custid FROM Sales.Orders

C. SELECTc.custid FROM Sales.Customers c LEFT OUTER Sales.Order oON c.custid = o.custid

D. SELECT c.custid FROM Sales.Customers c LEFT OUTER JOIN Sales.Order oON c.custid = o.custid WHERE orderid IS NULL

E. SELECT custid FROM Sales.Customers UNION ALL SELECT custid FROM Sales.Orders

F. SELECT custid FROM Sales.Customers UNION SELECT custid FROM Sales.Orders

G. SELECT c.custid FROM Sales.Customers c RIGHT OUTER JOIN Sales.Orders o ON c.custid = o.custid

Correct Answer: D

Inner joins return rows only when there is at least one row from both tables that matches the join condition. Inner joins eliminate the rows that do not match with a row from the other table. Outer joins, however, return all rows from at least one of the tables or views mentioned in the FROM clause, as long as those rows meet any WHERE or HAVING search conditions. All rows are retrieved from the left table referenced with a left outer join, and all rows from the right table referenced in a right outer join. All rows from both tables are returned in a full outer join.

References: https://technet.microsoft.com/en-us/library/ms187518(v=sql.105).aspx


Question 3:

You have a database named MyDb. You run the following Transact-SQL statements:

A value of 1 in the IsActive column indicates that a user is active.

You need to create a count for active users in each role. If a role has no active users. You must display a zero as the active users count.

Which Transact-SQL statement should you run?

A. B. C. D.

Correct Answer: B


Question 4:

Note: This question is part of a series of questions that use the same or similar answer choices. An answer choice may be correct for more than one question in the series. Each question is independent of the other questions in this series.

Information and details provided in a question apply only to that question.

You have a database that contains several connected tables. The tables contain sales data for customers in the United States only.

You need to create a query that generates sample data for a sales table in the database. The query must include every product in the inventory for each customer.

Which statement clause should you use?

A. GROUP BY

B. MERGE

C. GROUP BY ROLLUP

D. LEFT JOIN

E. GROUP BY CUBE

F. CROSS JOIN

G. PIVOT

H. UNPIVOT

Correct Answer: C

Reference: https://docs.microsoft.com/en-us/sql/t-sql/queries/select-group-by-transact-sql?view=sql-server-2017


Question 5:

SIMULATION

You have a database that contains a table named Products in the Sales schema. The table was created by running the following Transact-SQL statement:

The table includes the data shown below:

You are developing a report that displays the following values and column headers in the order listed below:

average price of a product named Average

the smallest number of products in stock named LowestNumber

the highest product price named HighestPrice

You need to write a query to return the results for the report. The query must meet the following requirements:

Use built-in, aggregate and mathematical functions.

Use two-part names and tables.

Use the table alias to qualify column names.

Define the alias for all fields by using the AS keyword.

Use the first letter of the table name as the table alias.

Do not use the ROW_NUMBER function.

Do not surround object names with square brackets.

Do not use variables.

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

2.

FROM Sales.Products AS P

Use the Check Syntax button to verify your work. Any syntax or spelling errors will be reported by line and character position. You may check syntax as many times as needed.

A. Check the answer in explanation.

Correct Answer: A


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Question 6:

SIMULATION

You work for an organization that monitors seismic activity around volcanos. You have a table named GroundSensors. The table stored data collected from seismic sensors. It includes the columns describes in the following table:

The database also contains a scalar value function named NearestMountain that accepts a parameter of type geography and returns the name of the mountain that is nearest to the sensor.

You need to create a query that shows the average of the normalized readings from the sensors for each mountain. The query must meet the following requirements:

Return the average normalized readings named AverageReading.

Return the nearest mountain name named Mountain.

Do not return any other columns.

Exclude sensors for which no normalized reading exists.

Construct the query using the following guidelines:

Use one part names to reference tables, columns and functions.

Do not use parentheses unless required.

Define column headings using the AS keyword.

Do not surround object names with square brackets.

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.

Use the Check Syntax button to verify your work. Any syntax or spelling errors will be reported by line and character position.

Correct Answer: explanation

Please see explanation

1 SELECT avg (normalizedreading) as AverageReading, location as Mountain

2 FROM GroundSensors

3 WHERE normalizedreading is not null

Note: On line 1 change to AverageReading and change to Mountain.


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