最新的Microsoft Developing SQL Databases - 070-762免費考試真題
問題1
You are analyzing the performance of a database environment.
You need to find all unused indexes in the current database.
How should you complete the Transact-SQL statement? To answer, select the appropriate Transact-SQL segments in the answer area.
You need to find all unused indexes in the current database.
How should you complete the Transact-SQL statement? To answer, select the appropriate Transact-SQL segments in the answer area.
正確答案:
Explanation
Sys.indexes
Sys.dm_db_index_usage_stats
Sys.tables
References: https://basitaalishan.com/2012/06/15/find-unused-indexes-using-sys-dm_db_index_usage_stats/
問題2
You have a data warehouse fact table that has a clustered columnstore index.
You have multiple CSV files that contain a total of 3 million rows of data.
You need to upload the data to the fact table. The solution must avoid the delta group when you import the data.
Which solution will achieve the goal in the least amount of time?
You have multiple CSV files that contain a total of 3 million rows of data.
You need to upload the data to the fact table. The solution must avoid the delta group when you import the data.
Which solution will achieve the goal in the least amount of time?
正確答案: A
說明：（僅 VCESoft 成員可見）
問題3
You have a table stores transactions partitions by year.
Users occasionally experience performance issues when they access the table. The table is located exclusively when the records are updated.
You need to prevent exclusive locks on the table and maintain data integrity.
What should you do?
Users occasionally experience performance issues when they access the table. The table is located exclusively when the records are updated.
You need to prevent exclusive locks on the table and maintain data integrity.
What should you do?
正確答案: C
問題4
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:
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 create an object that allows finance users to be able to retrieve the required data. The object must not have a negative performance impact.
How should you complete the Transact-SQL statements? To answer, select the appropriate Transact-SQL segments in the answer area.
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:
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 create an object that allows finance users to be able to retrieve the required data. The object must not have a negative performance impact.
How should you complete the Transact-SQL statements? To answer, select the appropriate Transact-SQL segments in the answer area.
正確答案:
Explanation
A user defined function can return a table, which can be produces by a SELECT statement.
From question: 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.
Incorrect:
Not VIEW: The RETURN clause is not used when you create a view.
References:
https://docs.microsoft.com/en-us/sql/t-sql/statements/create-function-transact-sql?view=sql-server-2017
問題5
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 DB1 that contains the following tables: Customer, CustomerToAccountBridge, and CustomerDetails. The three tables are part of the Sales schema. The database also contains a schema named Website. You create the Customer table by running the following Transact-SQL statement:
The value of the CustomerStatus column is equal to one for active customers. The value of the Account1Status and Account2Status columns are equal to one for active accounts. The following table displays selected columns and rows from the Customer table.
You plan to create a view named Website.Customer and a view named Sales.FemaleCustomers.
Website.Customer must meet the following requirements:
* Allow users access to the CustomerName and CustomerNumber columns for active customers.
* Allow changes to the columns that the view references. Modified data must be visible through the view.
* Prevent the view from being published as part of Microsoft SQL Server replication.
Sales.Female.Customers must meet the following requirements:
* Allow users access to the CustomerName, Address, City, State and PostalCode columns.
* Prevent changes to the columns that the view references.
* Only allow updates through the views that adhere to the view filter.
You have the following stored procedures: spDeleteCustAcctRelationship and spUpdateCustomerSummary.
The spUpdateCustomerSummary stored procedure was created by running the following Transact-SQL statement:
You run the spUpdateCustomerSummary stored procedure to make changes to customer account summaries.
Other stored procedures call the spDeleteCustAcctRelationship to delete records from the CustomerToAccountBridge table.
When a procedure calls spDeleteCustAcctRelationship, if the calling stored procedures has already started an active transaction, all the detections made by the spDeleteCustAccRelationship stored procedure must be committed by the caller; otherwise changes must be committed within the spDeleteCustAcctRelationship stored procedure.
If any error occurs during the delete operation, only the deletes made by the soDeleteCustACCTRelationships stored procedure must be rolled back and the status must be updated.
You need to complete the stored procedure to ensure all the requirements are met.
How should you complete the procedure? To answer, drag the Transact-SQL segments to the correct location.
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.
You have a database named DB1 that contains the following tables: Customer, CustomerToAccountBridge, and CustomerDetails. The three tables are part of the Sales schema. The database also contains a schema named Website. You create the Customer table by running the following Transact-SQL statement:
The value of the CustomerStatus column is equal to one for active customers. The value of the Account1Status and Account2Status columns are equal to one for active accounts. The following table displays selected columns and rows from the Customer table.
You plan to create a view named Website.Customer and a view named Sales.FemaleCustomers.
Website.Customer must meet the following requirements:
* Allow users access to the CustomerName and CustomerNumber columns for active customers.
* Allow changes to the columns that the view references. Modified data must be visible through the view.
* Prevent the view from being published as part of Microsoft SQL Server replication.
Sales.Female.Customers must meet the following requirements:
* Allow users access to the CustomerName, Address, City, State and PostalCode columns.
* Prevent changes to the columns that the view references.
* Only allow updates through the views that adhere to the view filter.
You have the following stored procedures: spDeleteCustAcctRelationship and spUpdateCustomerSummary.
The spUpdateCustomerSummary stored procedure was created by running the following Transact-SQL statement:
You run the spUpdateCustomerSummary stored procedure to make changes to customer account summaries.
Other stored procedures call the spDeleteCustAcctRelationship to delete records from the CustomerToAccountBridge table.
When a procedure calls spDeleteCustAcctRelationship, if the calling stored procedures has already started an active transaction, all the detections made by the spDeleteCustAccRelationship stored procedure must be committed by the caller; otherwise changes must be committed within the spDeleteCustAcctRelationship stored procedure.
If any error occurs during the delete operation, only the deletes made by the soDeleteCustACCTRelationships stored procedure must be rolled back and the status must be updated.
You need to complete the stored procedure to ensure all the requirements are met.
How should you complete the procedure? To answer, drag the Transact-SQL segments to the correct location.
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.
正確答案:
Explanation
Savepoints offer a mechanism to roll back portions of transactions. You create a savepoint using the SAVE TRANSACTION savepoint_name statement. Later, you execute a ROLLBACK TRANSACTION savepoint_name statement to roll back to the savepoint instead of rolling back to the start of the transaction.
References: https://technet.microsoft.com/en-us/library/ms178157(v=sql.105).aspx
問題6
You manage a database that includes the tables shown in the exhibit (Click the Exhibit button.)
You plan to create a DML trigger that reads the value of the LineTotal column for each row in the PurchaseOrderDetail table. The trigger must add the value obtained to the value in the SubTotal column of the PurchaseOrderHeader table.
You need to organize the list to form the appropriate Transact-SQL statement.
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.
You plan to create a DML trigger that reads the value of the LineTotal column for each row in the PurchaseOrderDetail table. The trigger must add the value obtained to the value in the SubTotal column of the PurchaseOrderHeader table.
You need to organize the list to form the appropriate Transact-SQL statement.
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.
正確答案:
Explanation
Box 1: Create TRIGGER NewPODetail
Box 2: ON PurchaseDetail
Box 3: AFTER INSERT AS
Basic syntax:
CREATE TRIGGER trigger_name
ON { table | view }
{ FOR | AFTER | INSTEAD OF }
{ [ INSERT ] [ , ] [ UPDATE ] [ , ] [ DELETE ] }
AS
{ sql_statement [ ; ] [ ,...n ] | EXTERNAL NAME <method specifier [ ; ] > } Box 4: Update PurchaseOrderHeader SET SubTotal = SubTotal + LineTotal FROM inserted Box 5: WHERE PurchaserOrderHeader.PurchaseOrderID= Inserted.PurchaseOrderID The trigger must read the value of the LineTotal column for each row in the PurchaseOrderDetail table. The trigger must add the value obtained to the value in the SubTotal column of the PurchaseOrderHeader table.
References:
https://docs.microsoft.com/en-us/sql/t-sql/statements/create-trigger-transact-sql?view=sql-server-2017
問題7
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.
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 create triggers that meet the following requirements:
* Optimize the performance and data integrity of the tables.
* Provide a custom error if a user attempts to create an order for a customer that does not exist.
* In the Customers table, update the value for the last order placed.
* Complete all actions as part of the original transaction.
In the table below, identify the trigger types that meet the requirements.
NOTE: Make only selection in each column. Each correct selection is worth one point.
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.
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 create triggers that meet the following requirements:
* Optimize the performance and data integrity of the tables.
* Provide a custom error if a user attempts to create an order for a customer that does not exist.
* In the Customers table, update the value for the last order placed.
* Complete all actions as part of the original transaction.
In the table below, identify the trigger types that meet the requirements.
NOTE: Make only selection in each column. Each correct selection is worth one point.
正確答案:
Explanation
INSTEAD OF INSERT triggers can be defined on a view or table to replace the standard action of the INSERT statement.
AFTER specifies that the DML trigger is fired only when all operations specified in the triggering SQL statement have executed successfully.
References: https://technet.microsoft.com/en-us/library/ms175089(v=sql.105).aspx
問題8
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 table that has a clustered index and a nonclustered index. The indexes use different columns from the table. You have a query named Query1 that uses the nonclustered index.
Users report that Query1 takes a long time to report results. You run Query1 and review the following statistics for an index seek operation:
You need to resolve the performance issue.
Solution: You defragment both indexes.
Does the solution meet the goal?
You have a table that has a clustered index and a nonclustered index. The indexes use different columns from the table. You have a query named Query1 that uses the nonclustered index.
Users report that Query1 takes a long time to report results. You run Query1 and review the following statistics for an index seek operation:
You need to resolve the performance issue.
Solution: You defragment both indexes.
Does the solution meet the goal?
正確答案: B
說明：（僅 VCESoft 成員可見）
問題9
Note: This question is part of a series of questions that use the same or similar answer choices. As 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 Microsoft SQL Server database named DB1 that contains the following tables:
Users frequently run the following query:
Users report that the query takes a long time to return results.
You need to minimize the amount of time requires for the query to return data.
What should you do?
Information and details provided in a question apply only to that question.
You have a Microsoft SQL Server database named DB1 that contains the following tables:
Users frequently run the following query:
Users report that the query takes a long time to return results.
You need to minimize the amount of time requires for the query to return data.
What should you do?
正確答案: G
問題10
You have a database that users query frequently.
The users report that during peak business hours, the queries take longer than expected to execute.
A junior database administrator uses Microsoft SQL Server Profiler on the database server to trace the session activities.
While performing the trace, the performance of the database server worsens, and the server crashes.
You need to recommend a solution to collect the query run times. The solution must minimize the impact on the resources of the database server.
What should you recommend?
The users report that during peak business hours, the queries take longer than expected to execute.
A junior database administrator uses Microsoft SQL Server Profiler on the database server to trace the session activities.
While performing the trace, the performance of the database server worsens, and the server crashes.
You need to recommend a solution to collect the query run times. The solution must minimize the impact on the resources of the database server.
What should you recommend?
正確答案: B
說明：（僅 VCESoft 成員可見）
問題11
You are developing an app that allows users to query historical company financial data. You are reviewing email messages from the various stakeholders for a project.
The message from the security officer is shown in the Security Officer Email exhibit below.
TO: Database developer
From: Security Officer
Subject: SQL object requirements
We need to simplify the security settings for the SQL objects. Having a assign permissions at every object in SQL is tedious and leads to a problem. Documentation is also more difficult when we have to assign permissions at multiple levels. We need to assign the required permissions at one object, even though that object may be obtaining from other objects.
The message from the sales manager is shown in the Sales Manager Email exhibit below.
TO: Database developer
From: Sales Manager
Subject: Needed SQL objects
When creating objects for our use, they need to be flexible. We will be changing the base infrastructure frequently. We need components in SQL that will provide backward compatibility to our front end applications as the environments change so that do not need to modify the front end applications. We need objects that can provide a filtered set of the data. The data may be coming from multiple tables and we need an object that can provide access to all of the data through a single object reference.
This is an example of the types of data we need to be able to have queries against without having to change the front end applications.
The message from the web developer is shown in the Web Developer Email exhibit below.
TO: Database developer
From: Web Developer
Subject: SQL Object component
Whatever you will be configuring to provide access to data in SQL, it needs to connect using the items referenced in this interface. We have been using this for a long time, and we cannot change this from end easily. Whatever objects are going to be used in SQL they must work using object types this interface references.
You need to create one or more objects that meet the needs of the security officer, the sales manager and the web developer.
For each of the following statements, select Yes if the statement is true. Otherwise, select No.
The message from the security officer is shown in the Security Officer Email exhibit below.
TO: Database developer
From: Security Officer
Subject: SQL object requirements
We need to simplify the security settings for the SQL objects. Having a assign permissions at every object in SQL is tedious and leads to a problem. Documentation is also more difficult when we have to assign permissions at multiple levels. We need to assign the required permissions at one object, even though that object may be obtaining from other objects.
The message from the sales manager is shown in the Sales Manager Email exhibit below.
TO: Database developer
From: Sales Manager
Subject: Needed SQL objects
When creating objects for our use, they need to be flexible. We will be changing the base infrastructure frequently. We need components in SQL that will provide backward compatibility to our front end applications as the environments change so that do not need to modify the front end applications. We need objects that can provide a filtered set of the data. The data may be coming from multiple tables and we need an object that can provide access to all of the data through a single object reference.
This is an example of the types of data we need to be able to have queries against without having to change the front end applications.
The message from the web developer is shown in the Web Developer Email exhibit below.
TO: Database developer
From: Web Developer
Subject: SQL Object component
Whatever you will be configuring to provide access to data in SQL, it needs to connect using the items referenced in this interface. We have been using this for a long time, and we cannot change this from end easily. Whatever objects are going to be used in SQL they must work using object types this interface references.
You need to create one or more objects that meet the needs of the security officer, the sales manager and the web developer.
For each of the following statements, select Yes if the statement is true. Otherwise, select No.
正確答案:
Explanation
* Stored procedure: Yes
A stored procedure to implement the following:
Whatever you will be configuring to provide access to data in SQL, it needs to connect using the items referenced in this interface. We have been using this for a long time, and we cannot change this from end easily. Whatever objects are going to be used in SQL they must work using object types this interface references.
* Trigger: No
No requirements are related to actions taken when changing the data.
* View: Yes
Because: We need objects that can provide a filtered set of the data. The data may be coming from multiple tables and we need an object that can provide access to all of the data through a single object reference.
