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Question 1:

You are building a stored procedure that will update data in a table named Table1 by using a complex query as the data source.

You need to ensure that the SELECT statement in the stored procedure meets the following requirements:

Data being processed must be usable in several statements in the stored procedure.

Data being processed must contain statistics.

What should you do?

A. Update Table1 by using a common table expression (CTE).

B. Insert the data into a temporary table, and then update Table1 from the temporary table.

C. Place the SELECT statement in a derived table, and then update Table1 by using a JOIN to the derived table.

D. Insert the data into a table variable, and then update Table1 from the table variable.

Correct Answer: B

Temp Tables… Are real materialized tables that exist in tempdb Have dedicated stats generated by the engine Can be indexed Can have constraints Persist for the life of the current CONNECTION Can be referenced by other queries or subproce Incorrect Answers:

A: CTEs do not have dedicated stats. They rely on stats on the underlying objects

C: Unlike a derived table, a CTE can be self-referencing and can be referenced multiple times in the same query.

References: https://technet.microsoft.com/en-us/library/ms190766(v=sql.105).aspx https://dba.stackexchange.com/questions/13112/whats-the-difference-between-a-cte-and-a-temp-table


Question 2:

Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while

others might not have a correct solution.

After you answer a question in this section. You will NOT be able to return to it. As a result, these questions will not appear in the review screen.

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

You have the following stored procedure:

You need to modify the stored procedure to meet the following new requirements:

Insert product records as a single unit of work.

Return error number 51000 when a product fails to insert into the database.

If a product record insert operation fails, the product information must not be permanently written to the database.

Solution: You run the following Transact-SQL statement:

Does the solution meet the goal?

A. Yes

B. No

Correct Answer: B


Question 3:

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 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 create a table by running the following Transact-SQL statement:

You need to return normalized data for all customers that were added in the year 2014. Which Transact-SQL statement should you run?

A. B. C. D. E. F. G. H.

Correct Answer: G


Question 5:

SIMULATION

You have a database that includes the following tables. All of the tables are in the Production schema.

You need to create a query that returns a list of product names for all products in the Beverages category.

Construct the query using the following guidelines:

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

Use two-part column names.

Do not surround object names with square brackets.

Do not use implicit joins.

Do not use variables.

Use single quotes to surround literal values.

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.

A. Check the answer in explanation.

Correct Answer: A


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Question 6:

DRAG DROP

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.

You query a database that includes two tables: Project and Task. The Project table includes the following columns:

Task level is defined using the following rules:

You need to determine the task level for each task in the hierarchy.

Which five 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 CAST (NULL AS INT) AS ParentTaskID, etc.

This statement selects all tasks with task level 0.

The ParentTaskID could be null so we should use CAST (NULL AS INT) AS ParentTaskID.

Box 2: UNION

We should use UNION and not UNION ALL as we do not went duplicate rows.

UNION specifies that multiple result sets are to be combined and returned as a single result set.

Incorrect Answers:

Not UNION ALL: ALL incorporates all rows into the results. This includes duplicates. If not specified, duplicate rows are removed.

Box 3, Box 4, Box 5:

These statements select all tasks with task level >0.

References:

https://msdn.microsoft.com/en-us/library/ms180026.aspx


Question 7:

DRAG DROP

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 on this series.

You have a database that tracks orders and deliveries for customers in North America. System versioning is enabled for all tables. The database contains the Sales.Customers, Application.Cities, and Sales.CustomerCategories tables.

Details for the Sales.Customers table are shown in the following table:

Details for the Application.Cities table are shown in the following table:

Details for the Sales.CustomerCategories table are shown in the following table:

You are creating a report to show when the first customer account was opened in each city. The report contains a line chart with the following characteristics:

The chart contains a data point for each city, with lines connecting the points.

The X axis contains the position that the city occupies relative to other cities.

The Y axis contains the date that the first account in any city was opened. An example chart is shown below for five cities:

During a sales promotion, customers from various cities open new accounts on the same date. You need to write a query that returns the data for the chart.

How should you complete the Transact-SQL statement? To answer, drag the appropriate Transact-SQL segments to the correct locations. Each Transact-SQL segment may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.

NOTE: Each correct selection is worth one point.

Select and Place:

Correct Answer:

Box 1: RANK() OVER

RANK returns the rank of each row within the partition of a result set. The rank of a row is one plus thenumber of ranks that come before the row in question.

ROW_NUMBER and RANK are similar. ROW_NUMBER numbers all rows sequentially (for example 1, 2, 3, 4, 5).

Incorrect Answers:

DENSE_RANK returns the rank of rows within the partition of a result set, without any gaps in the ranking. The rank of a row is one plus the number of distinct ranks that come before the row in question.

Box 2: (PARTITION BY CityID ORDER BY MIN(AccountOpenedDate) DESC)

Syntax for RANK: RANK ( ) OVER ( [ partition_by_clause ] order_by_clause )

Box 3: GROUP BY CityID

References: https://msdn.microsoft.com/en-us/library/ms176102.aspx


Question 8:

SIMULATION

You have a table named Cities that has the following two columns: CityID and CityName. The CityID column uses the int data type, and CityName uses nvarchar(max).

You have a table named RawSurvey. Each row includes an identifier for a question and the number of persons that responded to that question from each of four cities. The table contains the following representative data:

A reporting table named SurveyReport has the following columns: CityID, QuestionID, and RawCount, where RawCount is the value from the RawSurvey table.

You need to write a Transact-SQL query to meet the following requirements:

Retrieve data from the RawSurvey table in the format of the SurveyReport table.

The CityID must contain the CityID of the city that was surveyed.

The order of cities in all SELECT queries must match the order in the RawSurvey table.

The order of cities in all IN statements must match the order in the RawSurvey table.

Construct the query using the following guidelines:

Use one-part names to reference tables and columns, except where not possible.

ALL SELECT statements must specify columns.

Do not use column or table aliases, except those provided.

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 Rawcount

2 from (select cityid,questioned,rawcount) AS t1

3 unpivot

4 (rawcount for questioned in (QuestionID)) AS t2

5 JOIN t2

6. ON t1.CityName = t2.cityName

UNPIVOT must be used to rotate columns of the Rawsurvey table into column values.

References: https://technet.microsoft.com/en-us/library/ms177410(v=sql.105).aspx


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