HOTSPOT
Note: This question is part of a series of questions that use the same scenario. For your convenience,
the scenario is repeated in each question. Each question presents a different goal and answer choices,
but the text of the scenario is exactly the same in each question in this series.
Start of repeated scenario
You have a database that contains the tables shown in the exhibit. (Click the Exhibit button.)
You review the Employee table and make the following observations:
Every record has a value in the ManagerID except for the Chief Executive Officer (CEO).
The FirstName and MiddleName columns contain null values for some records.
The valid values for the Title column are Sales Representative manager, and CEO.
You review the SalesSummary table and make the following observations:
The ProductCode column contains two parts: The first five digits represent a product code, and the last
seven digits represent the unit price. The unit price uses the following pattern: ####.##.
You observe that for many records, the unit price portion of the ProductCode column contains values.
The RegionCode column contains NULL for some records.
Sales data is only recorded for sales representatives.
You are developing a series of reports and procedures to support the business. Details for each report or
procedure follow.
Sales Summary report: This report aggregates data by year and quarter. The report must resemble the following table.
Sales Manager report: This report lists each sales manager and the total sales amount for all employees that
report to the sales manager.
Sales by Region report: This report lists the total sales amount by employee and by region. The report must
include the following columns: EmployeeCode, MiddleName, LastName, RegionCode, and SalesAmount. If
MiddleName is NULL, FirstName must be displayed. If both FirstName and MiddleName have null values, the
world Unknown must be displayed/ If RegionCode is NULL, the word Unknown must be displayed.
Report1: This report joins data from SalesSummary with the Employee table and other tables. You plan to
create an object to support Report1. The object has the following requirements:
be joinable with the SELECT statement that supplies data for the report
can be used multiple times with the SELECT statement for the report
be usable only with the SELECT statement for the report
not be saved as a permanent object
Report2: This report joins data from SalesSummary with the Employee table and other tables.
You plan to create an object to support Report1. The object has the following requirements:
be joinable with the SELECT statement that supplies data for the report
can be used multiple times for this report and other reports
accept parameters
be saved as a permanent object
Sales Hierarchy report: This report aggregates rows, creates subtotal rows, and super-aggregates rows over
the SalesAmount column in a single result-set. The report uses SaleYear, SaleQuarter, and SaleMonth as a
hierarchy. The result set must not contain a grand total or cross-tabulation aggregate rows.
Current Price Stored Procedure: This stored procedure must return the unit price for a product when a product
code is supplied. The unit price must include a dollar sign at the beginning. In addition, the unit price must
contain a comma every three digits to the left of the decimal point, and must display two digits to the left of the
decimal point. The stored procedure must not throw errors, even if the product code contains invalid data.
End of Repeated Scenario
You need to create the query for the Sales by Region report.
Which function should you apply to each column? To answer, select the appropriate options in the answer area.
Hot Area:
Answer: 
Explanation:
Box 1: COALESCE
COALESCE evaluates the arguments in order and returns the current value of the first expression that initially
does not evaluate to NULL.
If MiddleName is NULL, FirstName must be displayed. If both FirstName and MiddleName have null values, the
world Unknown must be displayed.
The following example shows how COALESCE selects the data from the first column that has a nonnull value.
SELECT Name, Class, Color, ProductNumber,
COALESCE(Class, Color, ProductNumber) AS FirstNotNull
FROM Production.Product;Not NULLIF: NULLIF returns the first expression if the two expressions are not equal. If the expressions are
equal, NULLIF returns a null value of the type of the first expression.
Box 2: COALESCE
If RegionCodeis NULL, the word Unknown must be displayed.
https://docs.microsoft.com/en-us/sql/t-sql/language-elements/coalesce-transact-sql
correct