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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 have a table that was created by running the following Transact-SQL statement:
The Products table includes the data shown in the following table:
TotalUnitPrice is calculated by using the following formula: TotalUnitPrice = UnitPrice
* (UnitsInStock + UnitsOnOrder)
You need to ensure that the value returned for TotalUnitPrice for ProductB is equal to
600.00. Solution: You run the following Transact-SQL statement:
Does the solution meet the goal?
The NULL value in the UnitsOnOrder field would cause a runtime error.
QUESTION: 56 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.
Box 1: SELECT..COALESCEâ€¦
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
You have the following subqueries: Subquery1, Subquery2, and Subquery3.
You need to replace the three subqueries with named result sets or temporary tables. The following requirements must be met:
Which replacement techniques should you use? To answer, select the appropriate options in the answer area.
Subquery1: common table expression (CTE) A common table expression (CTE) can be thought of as a temporary result set that is defined within the execution scope of a single SELECT, INSERT, UPDATE, DELETE, or CREATE VIEW statement. A CTE is
similar to a derived table in that it is not stored as an object and lasts only for the duration of the query. Unlike a derived table, a CTE can be self-referencing and can be referenced multiple times in the same query. Subquery2: global temporary table Global temporary tables are visible to any user and any connection after they are created, and are deleted when all users that are referencing the table disconnect from the instance of SQL Server. Subquery3: local temporary table Local temporary tables are visible only to their creators during the same connection to an instance of SQL Server as when the tables were first created or referenced. Local temporary tables are deleted after the user disconnects from the instance of SQL Server.
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?
Update Table1 by using a common table expression (CTE).
Insert the data into a temporary table, and then update Table1 from the temporary table.
Place the SELECT statement in a derived table, and then update Table1 by using a JOIN to the derived table.
Insert the data into a table variable, and then update Table1 from the table variable.
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
QUESTION: 59 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 are developing a database to track customer orders. The database contains the following tables: Sales.Customers, Sales.Orders, and Sales.OrderLines. The following table describes the columns in Sales.Customers.
The following table describes the columns in Sales.Orders.
The following table describes the columns in Sales.OrderLines.
You need to create a function that accepts a CustomerID as a parameter and returns the following information:
all customer information for the customer
the total number of orders for the customer
the total price of all orders for the customer
the average quantity of items per order
How should you complete the function definition? To answer, drag the appropriate Transact-SQL segment to the correct locations. 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.
Box1: RETURNS TABLE
The function should return the following information:
all customer information for the customer
the total number of orders for the customer
the total price of all orders for the customer
the average quantity of items per order Box 2: COUNT
The function should return the total number of orders for the customer. Box 3: SUM The function should return the total price of all orders for the customer. Box 3. AVG The function should return the average quantity of items per order. Box 4: GROUP BY Need to use GROUP BY for the aggregate functions.
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 transaction is correctly defined for the INSERT INTO ..VALUES statement, and if there is an error in the transaction it will be caught ant he transaction will be rolled back. However, error number 51000 will not be returned, as it is only used in an IF @ERROR
= 51000 statement.
Note: @@TRANCOUNT returns the number of BEGIN TRANSACTION statements that have occurred on the current connection.
Microsoft 70-761 Exam (Querying Data with Transact-SQL) Detailed Information
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70-761 Querying Data with Transact-SQL
Study Guide Prepared by Killexams.com Microsoft Dumps Experts
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Killexams.com 70-761 Dumps | Real Questions 2019
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70-761 exam Dumps Source : Download 100% Free 70-761 Dumps PDF
Test Code : 70-761
Test Name : Querying Data with Transact-SQL
Vendor Name : Microsoft
Q&A : 130 Real Questions
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Querying Data with Transact-SQL book
statistics Compression in SQL Server 2012 | 70-761 Real Questions and VCE Practice Test
This chapter is from the e-book ?
With information explosion happening in the trade and commercial enterprise, more and more information is being kept within SQL Server. although, the databases are not any longer averaging 100GB in measurement as they have been 10 years in the past. Now databases are becoming larger than ever, with sizes from 10 to 50TB now being usual. moreover, it's commonly most effective a choose few tables inside the database that are becoming to these record-breaking sizes. To combat this, even though storage is getting more affordable, Microsoft has brought data compression and equipment, particularly the facts Compression Wizard and selected Transact-SQL statements, to facilitate facts compression. for this reason, a DBA can compress tables and indexes to conserve space for storing at a mild CPU can charge. one of the crucial leading design dreams of information compression became to shrink records warehouse reality tables. fact tables are typically the greatest tables within a data warehouse as a result of
they comprise the vast majority of the statistics associated with a database.
SQL Server provides two methods, web page and Row compression, to in the reduction of data storage on disk and speed I/O performance with the aid of decreasing the volume of I/O required for transaction processing. web page and row compression work in distinct, yet complementary, ways and are worth further dialogue.
page compression uses an algorithm called “deduplication.” When deduplicating, as the name implies, SQL Server looks for reproduction values that appear again and again in the records web page. as an instance, the table HumanResources.worker within the AdventureWorks2012 database carries an nvarchar(50) column referred to as JobTitle. This column incorporates many reproduction values—things like “Design Engineer” and analysis and construction supervisor.” These values may seem time and again on a single statistics page. the usage of web page compression, SQL Server can remove such reproduction values within a data page with the aid of changing each reproduction price with a tiny pointer to a single look of the full value. (by the way, here is called “dictionary-based mostly compression.”)
through comparison, row compression doesn't definitely use a compression algorithm per se. in its place, when row compression is enabled, SQL Server with ease gets rid of any added, unused bytes in a hard and fast statistics type column, corresponding to a CHAR(50) column.
page and row compression are not suitable, however with the aid of enabling web page compression SQL Server instantly includes row compression. that you may also specify compression per partition, so partitioned tables may have numerous compression specifications at once.
the use of the records Compression Wizard to Compress house
The facts Compression Wizard can also be used to investigate and compress house associated with a desk saved in a heap or clustered index structure. additionally, it might probably also help compression tables the use of nonclustered index and index views. eventually, if the desk is partitioned, a DBA can compress portions of the tables, and quite a few partitions would not have to keep the same compressed settings.
The facts Compression Wizard can also be invoked through correct-clicking any table or index and opting for Storage and then manipulate Compression. the 1st step is to select the compression type in keeping with a partition quantity, or you can decide to use the identical compression for all partitions. The compression alternatives encompass Row, page, or None, indicating no compression.
The subsequent step is to click on the Calculate button to overview the disk can charge savings. The cost discount rates should be displayed in the Requested Compressed space column in line with a partition number. here's displayed in determine three.14. The ultimate step includes identifying an output choice. it is possible to create a script, run instantly, or schedule the project to commence at a later time.
determine three.14. Specifying the compression classification with the statistics Compression Wizard.
facts Compression with Transact SQL
For these of you who don't like the usage of a GUI, the following examples outline the default syntax for compressing data with Transact-SQL.
creating a desk with Row Compression Enabled CREATE table (
the following Transact-SQL syntax illustrates compressing the earnings Order detail desk in the AdventureWorks2012 database via the page compression environment:
USE [AdventureWorks2012] ALTER desk [Sales].[SalesOrderDetail] REBUILD PARTITION = ALL WITH (DATA_COMPRESSION = page )
you could monitor compression undertaking with the efficiency counters page Compression makes an attempt/sec and web page Compressed/sec found in the SQL Server entry strategies Object. for example, this Transact-SQL code will question each counters:
opt for cntr_value FROM sys.dm_os_performance_counters where counter_name LIKE 'page Compression%'
As mentioned prior, compression is protected simplest in the enterprise version of SQL Server. Compression technologies dramatically cut I/O requests and storage; youngsters, the storage gained is usually on the cost of introduced CPU exercise. for this reason, it's strongly recommended that you just check earlier than imposing statistics compression in a construction workload scenario. In most transaction processing scenarios, SQL Server has CPU to spare and sorely wants greater I/O throughput. youngsters, on occasion the growth to I/O performance is not big enough to warrant the lost CPU. look at various to make certain that performance isn't negatively impacted.
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