We offers . "Developing SQL Databases (beta)", also known as 70-762 exam, is a Microsoft Certification. This set of posts, Passing the 70-762 exam with , will help you answer those questions. The covers all the knowledge points of the real exam. 100% real and revised by experts!

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NEW QUESTION 1
Background
You have a database named HR1 that includes a table named Employee.
You have several read-only, historical reports that contain regularly changing totals. The reports use multiple queries to estimate payroll expenses. The queries run concurrently. Users report that the payroll estimate reports do not always run. You must monitor the database to identify issues that prevent the reports from running.
You plan to deploy the application to a database server that supports other applications. You must minimize the amount of storage that the database requires.
Employee Table
You use the following Transact-SQL statements to create, configure, and populate the Employee table:
70-762 dumps exhibit
Application
You have an application that updates the Employees table. The application calls the following stored procedures simultaneously and asynchronously:
- UspA: This stored procedure updates only the EmployeeStatus column.
- UspB: This stored procedure updates only the EmployeePayRate column.
The application uses views to control access to data. Views must meet the following requirements:
- Allow user access to all columns in the tables that the view accesses.
- Restrict updates to only the rows that the view returns. Exhibit
70-762 dumps exhibit
Users must only be able to modify data in the Employee table by using the vwEmployee view. You must prevent users from viewing the view definition in catalog views.
You need to identify the view attribute to use when creating vwEmployee. In the table below, identify the attributes that you must use.
NOTE: Make only one selection in each column.
70-762 dumps exhibit

    Answer:

    Explanation: References: https://msdn.microsoft.com/en-us/library/ms187956.aspx

    NEW 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. Determine whether the solution meets the stated goals.
    You need to create a stored procedure that updates the Customer, CustomerInfo, OrderHeader, and OrderDetails tables in order.
    You need to ensure that the stored procedure:
    - Runs within a single transaction.
    - Commits updates to the Customer and CustomerInfo tables regardless of the status of updates to the OrderHeader and OrderDetail tables.
    - Commits changes to all four tables when updates to all four tables are successful. Solution: You create a stored procedure that includes the following Transact-SQL segment:
    70-762 dumps exhibit
    Does the solution meet the goal?

    • A. Yes
    • B. No

    Answer: B

    Explanation: References:
    http://stackoverflow.com/questions/11444923/stored-procedure-to-update-multiple-tables

    NEW QUESTION 3
    You use Microsoft SQL Server Profile to evaluate a query named Query1. The Profiler report indicates the following issues:
    - At each level of the query plan, a low total number of rows are processed.
    - The query uses many operations. This results in a high overall cost for the query. You need to identify the information that will be useful for the optimizer.
    What should you do?

    • A. Start a SQL Server Profiler trace for the event class Auto Stats in the Performance event category.
    • B. Create one Extended Events session with the sqlserver.missing_column_statistics eventadded.
    • C. Start a SQL Server Profiler trace for the event class Soft Warnings in the Errors and Warnings event category.
    • D. Create one Extended Events session with the sqlserver.missing_join_predicate event added.

    Answer: D

    Explanation: The Missing JoinPredicate event class indicates that a query is being executed that has no join predicate. This could result in a long-running query.

    NEW QUESTION 4
    Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution. Determine whether the solution meets the stated goals.
    You have a database that contains a table named Employees. The table stores information about the employees of your company.
    You need to implement and enforce the following business rules:
    - Limit the values that are accepted by the Salary column.
    - Prevent salaries less than $15,000 and greater than $300,000 from being entered.
    - Determine valid values by using logical expressions.
    - Do not validate data integrity when running DELETE statements. Solution: You implement a check constraint on the table.
    Does the solution meet the goal?

    • A. Yes
    • B. No

    Answer: A

    Explanation: References: https://en.wikipedia.org/wiki/Check_constraint

    NEW QUESTION 5
    You must create two staging database tables. The tables have the following requirements:
    70-762 dumps exhibit
    You need to select the correct storage mechanism for each table.
    Which storage mechanism should you use? To answer, drag the appropriate table types to the correct tables. Each table type 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.
    70-762 dumps exhibit

      Answer:

      Explanation: 70-762 dumps exhibit

      NEW QUESTION 6
      Note: This question is part of a series of questions that use the same answer choices. An answer choice may be correct for more than one question on 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 work on an OLTP database that has no memory-optimized file group defined.
      You have a table named tblTransaction that is persisted on disk and contains the information described in the following table:
      70-762 dumps exhibit
      Users report that the following query takes a long time to complete.
      70-762 dumps exhibit
      You need to create an index that:
      -improves the query performance
      -does not impact the existing index
      -minimizes storage size of the table (inclusive of index pages). What should you do?

      • A. Create a clustered index on the table.
      • B. Create a nonclustered index on the table.
      • C. Create a nonclustered filtered index on the table.
      • D. Create a clustered columnstore index on the table.
      • E. Create a nonclustered columnstore index on the table.
      • F. Create a hash index on the table.

      Answer: C

      Explanation: A filtered index is an optimized nonclustered index, especially suited to cover queries that select from a well-defined subset of data. It uses a filter predicate to index a portion of rows in the table. A well-designed
      filtered index can improve query performance, reduce index maintenance costs, and reduce index storage costs compared with full-table indexes.

      NEW QUESTION 7
      You need to build a function that meets the following requirements:
      How should you complete the Transact-SQL statement? To answer, drag the appropriate Transact-SQL statements 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.
      70-762 dumps exhibit

        Answer:

        Explanation: References: https://technet.microsoft.com/en-us/library/ms189294(v=sql.105).aspx

        NEW QUESTION 8
        You are analyzing the performance of a database environment.
        You suspect there are several missing indexes in the current database.
        You need to return a prioritized list of the missing indexes on the current database.
        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.
        70-762 dumps exhibit

          Answer:

          Explanation: Box 1: sys.db_db_missing_index_group_stats
          The sys.db_db_missing_index_group_stats table include the required columns for the main query: avg_total_user_cost, avg_user_impact, user_seeks, and user scans.
          Box 2: group_handle
          Example: The following query determines which missing indexes comprise a particular missing index group, and displays their column details. For the sake of this example, the missing index group handle is 24.
          SELECT migs.group_handle, mid.*
          FROM sys.dm_db_missing_index_group_stats AS migs INNER JOIN sys.dm_db_missing_index_groups AS mig ON (migs.group_handle = mig.index_group_handle) INNER JOIN sys.dm_db_missing_index_details AS mid ON (mig.index_handle = mid.index_handle)
          WHERE migs.group_handle = 24;
          Box 3: sys.db_db_missing_index_group_stats
          The sys.db_db_missing_index_group_stats table include the required columns for the subquery: avg_total_user_cost and avg_user_impact.
          Example: Find the 10 missing indexes with the highest anticipated improvement for user queries
          The following query determines which 10 missing indexes would produce the highest anticipated cumulative improvement, in descending order, for user queries.
          SELECT TOP 10 *
          FROM sys.dm_db_missing_index_group_stats
          ORDER BY avg_total_user_cost * avg_user_impact * (user_seeks + user_scans)DESC;

          NEW QUESTION 9
          You are developing an ETL process to cleanse and consolidate incoming data. The ETL process will use a reference table to identify which data must be cleansed in the target table. The server that hosts the tables restarts daily.
          You need to minimize the amount of time it takes to execute the query and the amount of time it takes to populate the reference table.
          What should you do?

          • A. Convert the target table to a memory-optimized tabl
          • B. Create a natively compiled stored procedure to cleanse and consolidate the data.
          • C. Convert the reference table to a memory-optimized tabl
          • D. Set the durability option toSCHEMA_AND_DATA>
          • E. Create a native compiled stored procedure to implement the ETL process for both tables.
          • F. Convert the reference table to a memory-optimized tabl
          • G. Set the durability option to SCHEMA_ONLY.

          Answer: D

          NEW QUESTION 10
          You have two databases with the following settings:
          70-762 dumps exhibit
          You run the following Transact –SQL statements:
          70-762 dumps exhibit
          You need to select data from DiskTable and insert the data into MemTable. You must complete the insertion operation into MemTable as an explicit transaction without immediate durability.
          Which four Transact-SQL segments should you use? 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.
          70-762 dumps exhibit

            Answer:

            Explanation: Box 1: BEGIN TRANSACTION
            Box 2: UPDATE … #Disktable
            Box 3: IF… SELECT INTO …#Disktable Box 4: .. DELAYED_DURABILITY = ON
            The COMMIT syntax is extended so you can force delayed transaction durability. If DELAYED_DURABILITY is DISABLED or FORCED at the database level (see above) this COMMIT option is ignored.
            Syntax:
            COMMIT [ { TRAN | TRANSACTION } ] [ transaction_name | @tran_name_variable ] ] [ WITH ( DELAYED_DURABILITY = { OFF | ON } ) ]
            References:
            https://docs.microsoft.com/en-us/sql/relational-databases/logs/control-transaction-durability?view=sql-server-20

            NEW QUESTION 11
            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 the series. Information and details provided in a question apply only to that question.
            You are developing an application to track customer sales.
            You need to create a database object that meets the following requirements:
            Launch when table data is modified.
            Evaluate the state a table before and after a data modification and take action based on the difference. Prevent malicious or incorrect table data operations.
            Prevent changes that violate referential integrity by cancelling the attempted data modification.
            Run managed code packaged in an assembly that is created in the Microsoft.NET Framework and located into Microsoft SQL Server.
            What should you create?

            • A. extended procedure
            • B. CLR procedure
            • C. user-defined procedure
            • D. DDL trigger
            • E. scalar-valued function
            • F. table-valued function

            Answer: B

            Explanation: You can create a database object inside SQL Server that is programmed in an assembly created in the Microsoft .NET Framework common language runtime (CLR). Database objects that can leverage the rich programming model provided by the CLR include DML triggers, DDL triggers, stored procedures, functions, aggregate functions, and types.
            Creating a CLR trigger (DML or DDL) in SQL Server involves the following steps:
            Define the trigger as a class in a .NETFramework-supported language. For more information about how to program triggers in the CLR, see CLR Triggers. Then, compile the class to build an assembly in the .NET Framework using the appropriate language compiler.
            Register the assembly in SQL Server using the CREATE ASSEMBLY statement. For more information about
            assemblies in SQL Server, see Assemblies (Database Engine). Create the trigger that references the registered assembly.
            References: https://msdn.microsoft.com/en-us/library/ms179562.aspx

            NEW QUESTION 12
            Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution. Determine whether the solution meets the stated goals.
            You have a database that contains a table named Employees. The table stores information about the employees of your company.
            You need to implement and enforce the following business rules:
            - Limit the values that are accepted by the Salary column.
            - Prevent salaries less than $15,000 and greater than $300,000 from being entered.
            - Determine valid values by using logical expressions.
            - Do not validate data integrity when running DELETE statements.
            Solution: You implement cascading referential integrity constraints on the table. Does the solution meet the goal?

            • A. Yes
            • B. No

            Answer: A

            Explanation: References: https://technet.microsoft.com/en-us/library/ms186973(v=sql.105).aspx

            NEW QUESTION 13
            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 have a database named Sales that contains the following database tables: Customer, Order, and Products. The Products table and the Order table are shown in the following diagram.
            70-762 dumps exhibit
            The customer table includes a column that stores the data for the last order that the customer placed.
            You plan to create a table named Leads. The Leads table is expected to contain approximately 20,000 records. Storage requirements for the Leads table must be minimized.
            You need to modify the database design to meet the following requirements:
            * Rows in the Orders table must always have a valid value for the ProductID column.
            * Rows in the Products table must not be deleted if they are part of any rows in the Orders table.
            * All rows in both tables must be unique.
            In the table below, identify the constraint that must be configured for each table. NOTE: Make only one selection in each column.
            70-762 dumps exhibit

              Answer:

              Explanation: A FOREIGN KEY in one table points to a PRIMARY KEY in another table. Here the foreign key constraint is put on the ProductID in the Orders, and points to the ProductID of the Products table.
              With a check constraint on the ProductID we can ensure that the Products table contains only unique rows.
              References:
              http://www.w3schools.com/sql/sql_foreignkey.asp

              NEW QUESTION 14
              You are analyzing the performance of a database environment.
              Applications that access the database are experiencing locks that are held for a large amount of time. You are experiencing isolation phenomena such as dirty, nonrepeatable and phantom reads.
              You need to identify the impact of specific transaction isolation levels on the concurrency and consistency of data.
              What are the consistency and concurrency implications of each transaction isolation level? To answer, drag the appropriate isolation levels to the correct locations. Each isolation level 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.
              70-762 dumps exhibit

                Answer:

                Explanation: Read Uncommitted (aka dirty read): A transaction T1executing under this isolation level can access data changed by concurrent transaction(s).
                Pros:No read locks needed to read data (i.e. no reader/writer blocking). Note, T1 still takes transaction duration locks for any data modified.
                Cons: Data is not guaranteed to be transactionally consistent.
                Read Committed: A transaction T1 executing under this isolation level can only access committed data. Pros: Good compromise between concurrency and consistency.
                Cons: Locking and blocking. The data can change when accessed multiple times within the same transaction.
                Repeatable Read: A transaction T1 executing under this isolation level can only access committed data with an additional guarantee that any data read cannot change (i.e. it is repeatable) for the duration of the transaction.
                Pros: Higher data consistency.
                Cons: Locking and blocking. The S locks are held for the duration of the transaction that can lower the concurrency. It does not protect against phantom rows.
                Serializable: A transaction T1 executing under this isolation level provides the highest data consistency including elimination of phantoms but at the cost of reduced concurrency. It prevents phantoms by taking a range lock or table level lock if range lock can’t be acquired (i.e. no index on the predicate column) for the duration of the transaction.
                Pros: Full data consistency including phantom protection.
                Cons: Locking and blocking. The S locks are held for the duration of the transaction that can lower the concurrency.
                References:
                https://blogs.msdn.microsoft.com/sqlcat/2011/02/20/concurrency-series-basics-of-transaction-isolation-levels/

                NEW QUESTION 15
                You run the following Transact-SQL statement:
                70-762 dumps exhibit
                There are multiple unique OrderlD values. Most of the UnitPrice values for the same OrderlD are different. You need to create a single index seek query that does not use the following operators:
                *Nested loop
                *Sort
                *Key lookup

                • A. CREATE INDEX IX_OrderLines_l ON OrderLines (OrderlD, UnitPrice) INCLUDE(Description, Quantity)
                • B. CREATE INDEX IX_OrderLines_l ON OrderLines (OrderlD, UnitPrice) INCLUOE(Quantity)
                • C. CREATE INDEX IX_OrderLines_l ON OrderLines (OrderlD, UnitPrice, Quantity)
                • D. CREATE INDEX IX_OrderLines_l ON OrderLines (UnitPrice, OrderlD) INCLUDE(Description, Quantity)

                Answer: A

                NEW QUESTION 16
                You are profiling a frequently used database table named UserEvents. The READ_COMMITED_SNAPSHOT database option is set to OFF.
                In the trace results, you observe that lock escalation occurred for one stored procedure even though the number of locks in the database did not exceed memory or configuration thresholds. Events details are provided in the following table:
                70-762 dumps exhibit
                You need to modify the uspDeleteEvents stored procedure to avoid lock escalation.
                How should you modify the stored procedure? To answer, select the appropriate Transact-SQL segments in the answer area.
                70-762 dumps exhibit

                  Answer:

                  Explanation: Delete up to 4000 rows at a time. Keep doing it until all rows have been deleted.
                  Note that @@ROWCOUNT returns the number of rows affected by the last statement. References: https://msdn.microsoft.com/en-us/library/ms187316.aspx

                  NEW QUESTION 17
                  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 have a database that contains the following tables: BlogCategory, BlogEntry, ProductReview, Product, and SalesPerson. The tables were created using the following Transact SQL statements:
                  70-762 dumps exhibit
                  You must modify the ProductReview Table to meet the following requirements:
                  * The table must reference the ProductID column in the Product table
                  * Existing records in the ProductReview table must not be validated with the Product table.
                  * Deleting records in the Product table must not be allowed if records are referenced by the ProductReview table.
                  * Changes to records in the Product table must propagate to the ProductReview table.
                  You also have the following database tables: Order, ProductTypes, and SalesHistory, The transact-SQL statements for these tables are not available.
                  You must modify the Orders table to meet the following requirements:
                  * Create new rows in the table without granting INSERT permissions to the table.
                  * Notify the sales person who places an order whether or not the order was completed.
                  You must add the following constraints to the SalesHistory table:
                  * a constraint on the SaleID column that allows the field to be used as a record identifier
                  * a constant that uses the ProductID column to reference the Product column of the ProductTypes table
                  * a constraint on the CategoryID column that allows one row with a null value in the column
                  * a constraint that limits the SalePrice column to values greater than four
                  Finance department users must be able to retrieve data from the SalesHistory table for sales persons where the value of the SalesYTD column is above a certain threshold.
                  You plan to create a memory-optimized table named SalesOrder. The table must meet the following requirements:
                  * The table must hold 10 million unique sales orders.
                  * The table must use checkpoints to minimize I/O operations and must not use transaction logging.
                  * Data loss is acceptable.
                  Performance for queries against the SalesOrder table that use Where clauses with exact equality operations must be optimized.
                  You need to enable referential integrity for the ProductReview table.
                  How should you complete the relevant Transact-SQL statement? To answer? select the appropriate Transact-SQL segments in the answer area.
                  Select two alternatives.

                  • A. For the first selection select: WITH CHECK
                  • B. For the first selection select: WITH NOCHECK
                  • C. For the second selection select: ON DELETE NO ACTION ON UPDATE CASCADE
                  • D. For the second selection select: ON DELETE CASCADE ON UPDATE CASCADE
                  • E. For the second selection select: ON DELETE NO ACTION ON UPDATE NO ACTION
                  • F. For the second selection select: ON DELETE CASCADE ON UPDATE NO ACTION

                  Answer: BC

                  Explanation: B: We should use WITH NOCHECK as existing records in the ProductReview table must not be validated with the Product table.
                  C: Deletes should not be allowed, so we use ON DELETE NO ACTION. Updates should be allowed, so we use ON DELETE NO CASCADE
                  NO ACTION: the Database Engine raises an error, and the update action on the row in the parent table is rolled back.
                  CASCADE: corresponding rows are updated in the referencing table when that row is updated in the parent table.
                  Note: ON DELETE { NO ACTION | CASCADE | SET NULL | SET DEFAULT }
                  Specifies what action happens to rows in the table that is altered, if those rows have a referential relationship and the referenced row is deleted from the parent table. The default is NO ACTION.
                  ON UPDATE { NO ACTION | CASCADE | SET NULL | SET DEFAULT }
                  Specifies what action happens to rows in the table altered when those rows have a referential relationship and the referenced row is updated in the parent table. The default is NO ACTION.
                  Note: You must modify the ProductReview Table to meet the following requirements:
                  1. The table must reference the ProductID column in the Product table
                  2. Existing records in the ProductReview table must not be validated with the Product table.
                  3. Deleting records in the Product table must not be allowed if records are referenced by the ProductReview table.
                  4. Changes to records in the Product table must propagate to the ProductReview table. References: https://msdn.microsoft.com/en-us/library/ms190273.aspx https://msdn.microsoft.com/en-us/library/ms188066.aspx

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