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You are the database administrator for a retail company. The company owns 270 stores. Every month, each store submits approximately 2,000 sales records, which are loaded into a SQL Server 2000 database at the corporate headquarters.A Data Transformation S

题目

You are the database administrator for a retail company. The company owns 270 stores. Every month, each store submits approximately 2,000 sales records, which are loaded into a SQL Server 2000 database at the corporate headquarters.

A Data Transformation Services (DTS) package transforms the sales records, as they are loaded. The package writes the transformed sales records to the Sales table, which has a column for integer primary key values. The IDENTITY property automatically assigns a key value to each transformed sales record.

After loading this month's sales data, you discover that a portion of the data contains errors. You stop loading data, identify the problem records, and delete those records from the database.

You want to reuse the key values that were assigned to the records that you deleted. You want to assign the deleted key values to the next sales records you load. You also want to disrupt users' work as little as possible.

What should you do?

A．Export all records from the Sales table to a temporary table. Truncate the Sales table, and then reload the records from the temporary table.

B．Export all records from the Sales table to a text file. Drop the Sales table, and then reload the records from the text file.

C．Use the DBCC CHECKIDENT statement to reseed the Sales table's IDENTITY property.

D．Set the Sales table's IDENTITY_INSERT property to ON. Add new sales records that have the desired key values.

参考答案和解析
正确答案：C
解析：Explanation: DBCC CHECKIDENT is used to check the current identity value for the specified table. It can be set to correct the identity value by specifying the RESEED option with DBCC CHECKIDENT.

Note: Example:
Assume that we have a table called test with an identity column with seed (1,1) and 1000 rows and that we delete row 901 to 950. We could then issue the command
DBCC CHECKIDENT (test, reseed, 900)

And load the 50 missing rows. These rows would get the values 901, 902, …,950 in the identity column.
We should then set the identity value to 1000 again:
DBCC CHECKIDENT (test, reseed, 1000)

So that the next new row will have identity 1001.

Incorrect Answers:
A: Exporting the data from the Sales table and then reloading the data will not correct errors contained in the table as these errors will also be exported as they are part of the data already in the table.
B: Exporting the data from the Sales table and then reloading the data will not correct errors contained in the table as these errors will also be exported as they are part of the data already in the table.

D: The SET IDENTITY_INSERT command allows explicit values to be inserted into the identity column of a table. To reuse the old key values from the rows that was deleted would require manual commands and would be awkward. This is not the best solution.
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相似问题和答案

第1题：

You are the administrator of two Microsoft Windows 2000 advanced server computers. On these servers, you are configuring a database that will store accounting information for your company.

The data must be available at all times. Interruptions in data connectivity should not last longer than five minutes. Any changes to the database should not require you to reconfigure the client computers.

How should you configure the database?

A．Configure the database on the two servers as a SQL Server 2000 cluster.

B．Configure the database on one server, and then configure a standby database on the second server.

C．Configure the database on each server. Use Microsoft Distributed Transaction Coordinator to keep the two servers perfectly synchronized.

D．Configure the database as a federated database, and then partition half the data on each server.


正确答案：A
解析：Explanation: SQL Server 2000 failover clustering provides high availability support by allowing us to configure one failover cluster to automatically, with no manual configuration, fail over to any other node in the failover cluster configuration. In this way, we minimize system downtime and provide high server availability during an operating system failure or a planned upgrade. Before SQL Server 2000 failover clustering can be set up, we must install Windows NT 4.0, Enterprise Edition, Windows 2000 Advanced Server or Windows 2000 Datacenter Server, and the Microsoft Cluster Service (MSCS).

In this scenario a cluster would be preferred to a standby server because it would be available immediately. A standby server on the other would require manual configuration and more time to become online.

Incorrect Answers:
B: A standby server would require you to reconfigure clients to allow it to connect to the standby server when the main server goes down. It would require at least several minutes of manual administration before the standby server would be operational. But the scenario requires that no reconfiguration of the client computers should be necessary. Therefore we should use a SQL Server 2000 cluster not a standby server.

Note: A standby server is a second server that contains a copy of the databases on the primary server and that can be brought online in the event of a primary server failure or due to scheduled maintenance on the primary server. This allows users to continue working with databases when the primary server becomes unavailable. When the primary server becomes available again, any changes to the standby server's copies of databases must be restored back to the primary server.

C: The Microsoft Distributed Transaction Coordinator coordinates distributed transactions, but would not increase availability.

Note: The Microsoft Distributed Transaction Coordinator (MS DTC) is a transaction manager that allows client applications to include several different sources of data in one transaction. MS DTC coordinates committing the distributed transaction across all the servers enlisted in the transaction.

An installation of SQL Server 2000 can participate in a distributed transaction by calling stored procedures on remote servers running SQL Server, automatically or explicitly promoting the local transaction to a distributed transaction and enlist remote servers in the transaction, and making distributed updates that update data on multiple OLE DB data sources. If these OLE DB data sources support the OLE DB distributed transaction interface, SQL Server 2000 can also enlist them in the distributed transaction. The MS DTC service coordinates the proper completion of the distributed transaction to ensure that either all of the updates on all the servers are made permanent, or, in the case of errors, all erased.

D: With Federated SQL Server 2000 servers, SQL Server 2000 databases can be spread across a group of autonomous database servers. These are capable of supporting the processing growth requirements of the largest Web sites and enterprise data-processing systems built with Microsoft Windows DNA, which divides the processing units of a data processing system into logical tiers. This however does not improve availability.

第2题：

You are the administrator of a SQL Server 2000 computer. Your company purchased an accounting application from a vendor. The application stores its data in a database named Accounting on the server. The tables in this database contain columns that function as primary keys, but PRIMARY KEY and FOREIGN KEY constraints are not used.

You need to replicate data from this database to another SQL Server computer. This server will use the replicated data to generate reports. Most reports will run each month, but the accounting department needs to have the ability to run reports at any time. Reports should be accurate through the last full working day.

You cannot make any changes to the database, but you need to implement replication. Which two actions should you take? (Each correct answer presents part of the solution. Choose two)

A．Implement merge replication.

B．Implement snapshot replication.

C．Implement transactional replication.

D．Schedule replication to run continuously.

E．Schedule replication to run during off-peak hours.


正确答案：BE
解析：Explanation:
B: Snapshot replication is the best solution since we will not be making changes to the Accounting database but need to replicate data from the database to another SQL Server computer and as the accounting department needs to have the ability to run reports that only need to be accurate through the last full working day.

E: Only one snap-shot replication would be necessary per day, and to make as little impact on the daily use of the server this replication should be scheduled during off-peak hours.

Note: SQL Server 2000 provides three types of replication that can be used in distributed applications. These are snapshot replication, transactional replication and merge replication. Each type provides different capabilities.

Snapshot replication is the process of copying and distributing data and database objects exactly as they were at the time the snapshot was taken. Snapshot replication does not require continuous monitoring of changes because changes made to published data are not propagated to the Subscriber incrementally. Subscribers are updated with a complete data set and not individual transactions. As snapshot replication replicates an entire data set at one time, it may take longer to propagate data modifications to Subscribers. This type of replication in helpful in situations when data is mostly static and does not change often; it is acceptable to have copies of data that are out of date for a period of time; replicating small volumes of data; and when sites are often disconnected and high latency (the amount of time between when data is updated at one site and when it is updated at another) is acceptable.

In transactional replication, an initial snapshot of data is propagated to Subscribers, and then when data modifications are made at the Publisher, the individual transactions are captured and propagated to Subscribers. SQL Server 2000 monitors INSERT, UPDATE, and DELETE statements, and changes to stored procedure executions and indexed views. SQL Server 2000 stores the transactions affecting replicated objects and then it propagates those changes to Subscribers continuously or at scheduled intervals. Transaction boundaries are preserved. Transactional replication is used when data modifications must be propagated to Subscribers, often as they occur; transactions must be atomic; subscribers are mostly connected to the Publisher and when the application will not tolerate high latency for Subscribers receiving changes.

Merge replication allows various sites to work autonomously and merge data modifications made at multiple sites into a single, uniform. result at a later time. The initial snapshot is applied to Subscribers and then SQL Server 2000 tracks changes to published data at the Publisher and at the Subscribers. The data is synchronized between servers either at a scheduled time or on demand. Updates are made independently at more than one server, so the same data may have been updated by the Publisher or by more than one Subscriber. Therefore, conflicts can occur when data modifications are merged. This type of replication is helpful when multiple Subscribers need to update data at various times and propagate those changes to the Publisher and to other Subscribers; Subscribers need to receive data, make changes offline, and synchronize changes later with the Publisher and other Subscribers; the application latency requirement is either high or low, and when site autonomy is critical.

Incorrect Answers:
A: No data at the second server will not be changed so there is no need to use merge replication.

C: We don’t need the accuracy of transactional replication. In this scenario high latency is permissible as the reports must be accurate only through the last full working day.

Note: Transactional replication is used when data modifications must be propagated to Subscribers, often as they occur; transactions must be atomic; subscribers are mostly connected to the Publisher and when the application will not tolerate high latency for Subscribers receiving changes.

D: As the reports must be accurate through the last full working day, it not necessary to run replication continuously. Running replication continuously will place locks on the destination database, which would hamper the performance of queries and actions run against the destination database.

第3题：

You are a database administrator in the Los Angeles branch office of a specialty foods supplier. A mainframe. database at the headquarters contains all company data. Each branch office contains a SQL Server 2000 computer that imports regional data from the mainframe. database.

The server in Los Angeles contains a Data Transformation Services (DTS) package that uses OLE DB to connect to the company's mainframe. database. The DTS package extracts and transforms data about buyers and products for that region. The DTS package then writes the data to the SQL Server database in Los Angeles.

You need to configure a SQL Server computer for the new branch office in Sydney. You want to copy the Los Angeles package and modify it so that it writes data to the SQL Server database in Sydney.

You use the DTS Designer to modify the DTS package so that it imports regional data from the mainframe. database to the server in Sydney. The modified DTS package runs successfully on the server in Los Angeles. You save this DTS package to the server in Sydney, but the server in Sydney cannot connect to the mainframe. database.

You want to enable the server in Sydney to connect to the mainframe. database. What should you do?

A．Change the connection properties in the DTS package so that the package uses new login credentials to connect to the mainframe. database.

B．Modify the workflow in the DTS package so that the server in Sydney is included.

C．On the server in Sydney, install an OLE DB provider for the mainframe. database.

D．On the server in Sydney, delete and then re-create the DTS package.


正确答案：C
解析：Explanation: OLE DB is an API that allows COM applications to use data from OLE DB data sources, which includes data stored in different formats. An application uses an OLE DB provider to access an OLE DB data source. An OLE DB provider is a COM component that accepts calls to the OLE DB API and performs the necessary processing required by request against the data source. In this scenario the OLE DB source is the company's mainframe. database, which contains all company data. As each branch office contains a SQL Server 2000 computer that imports regional data from the mainframe. database, all existing and future branch office SQL Server 2000 servers will require an OLE DB provider to access the company's mainframe. database.

Incorrect Answers:
A: The DTS package requires an OLE DB provider to access an OLE DB data source. It needs this provider to connect to the company's mainframe. database. Resetting the connection properties in the DTS package so that the package uses new login credentials to connect to the mainframe. database will not provide the DTS package with the required access to the mainframe. database.

B: A separate DTS package must be created for the Sydney branch office. This DTS package must extract data from the company's mainframe. computer that is relevant to the branch office in Sydney. The existing DTS package used to extract data from the company's mainframe. for the Los Angeles SQL Server 2000 server can be modified to serve the same function for the Sydney office.

D: Re-creating the DTS package on the SQL Server 2000 server in the branch office in Sydney is unnecessary the that SQL Server 2000 server would still require an OLE DB provider to access the company’s mainframe. database. It would require less administrative effort to modify the existing DTS package.

第4题：

You are a professional level SQL Server 2005 database administrator in an international corporation named Wiikigo. You are experienced in implementing high-availability solutions， monitoring the database server， and design deployment. In the company， you major job is the deployment， maintenance and support of Microsoft SQL Server 2005. You work as a database administrator for your company. A user database named Products is included by your SQL Server 2005 computer. SQL Server Integration Services （SSIS） packages are utilized to export data from the Products database to a text file. You deliver the text file to your company’s trading partners by utilizing FTP. You are required to make sure that your SSIS packages can be recovered from the occurrence of a disaster.  Which action should be performed to finish the task？（）

  • A、To finish the task，the Products database should be backed up.
  • B、To finish the task，your server should be set to utilize the full recovery model.
  • C、To finish the task，your server should be set to utilize the bulk-logged recovery model.
  • D、To finish the task， the msdb database should be backed up.

正确答案:D

第5题：

You are a database administrator for your company. The company uses a vendor company’s application that is based on a proprietary database. You query data from the application database and import the data into a SQL Server 2005 database. The application vendor provides you with a new OLE DB driver to be used when querying the application database. Company policy prohibits connections between the SQL Server database and the application database， except when querying this data. You need to provide a way to query data from the application database. What should you？（）

  • A、Configure a Linked Server connection to the application database.
  • B、Write a query that uses an OPENDATASOURCE command.
  • C、Write a query that uses an OPENQUERY command.
  • D、Configure a Remote Server connection to the application database.

正确答案:B

第6题：

You are the administrator of a SQL Server 2000 computer. Your company uses the server to store service contract information for its customers.

You are also the administrator of Oracle relational database management system (RDBMS) server.

This server is used to store your company’s financial information. The financial information is updated frequently throughout the day.

You need to create a series of reports that combine the service contract information and the financial information. These reports will be updated several times a day.

You want to create reports on the SQL Server computer by using the minimum amount of disk space.

What should you do?

A．Set up SQL server replication to replicate the data from the oracle server to the SQL server computer.

B．Set up the oracle server as a linked server. Create a view that joins the service contract information and the financial information.

C．Set up data transformation services (DTS) package that imports and transforms the database from the oracle server to the SQL server computer. Use SQL server agent to execute the DTS package throughout the day as needed.

D．Set up Microsoft ActiveX script. that connects to the oracle server and imports the financial information into SQL server temporary table. Create a view that joins the service contract information and the temporary table.


正确答案：B
解析：Explanation: SQL Server 2000 permits the creation of links to OLE DB data sources called linked servers. After linking to an OLE DB data source, it is possible to reference rowsets from the OLE DB data sources as tables in Transact-SQL statements and to pass commands to the OLE DB data sources and include the resulting rowsets as tables in Transact-SQL statements.

Each distributed query can reference multiple linked servers and can perform. either update or read operations against each individual linked server. A single distributed query can perform. read operations against some linked servers and update operations against other linked servers. The Microsoft OLE DB Provider for Oracle allows distributed queries to query data in Oracle databases.

Incorrect Answers:
A: Replication allows for the coping, distribution, and modification of data across an enterprise. This involves the copying of database data from one server to another. This is not the best solution in this scenario as this will require frequent replication because the reports must be updated several times a day.

C: Data Transformation Services is a set of graphical tools and programmable objects that allows for the extraction, transformation, and consolidation of data from disparate sources into single or multiple destinations. In this scenario, however, the Oracle database needs to be included in a query. Hence, Data Transformation Services are inappropriate.

D: Microsoft ActiveX scripts can be used to add functionality to Data Transformation Services packages, which is a set of graphical tools and programmable objects that allows for the extraction, transformation, and consolidation of data from disparate sources into single or multiple destinations. In this scenario, however, the Oracle database needs to be included in a query. Hence, Data Transformation Services are inappropriate.

第7题：

You work in a company which is named Wiikigo Corp. The company uses SQL Server 2008. You are the administrator of the company database. Now you are in charge of a SQL Server 2008 instance. Now according to the company requirement, you are designing a consolidated repository of performance data. You must make sure that the four requirements below are met: the data collector is used to gather performance information; a single database stores performance information for all instances; performance information that is older than 15 days is deleted; reduce the administrative effort to manage performance to the least. So what action should you perform to achieve this goal? （） 

  • A、You should create a SQL Agent job process on each instance to store and delete performance data in a single database for all instances. 
  • B、You should configure a management data warehouse process on each instance, then use this process to store and delete performance data in a single database for all instances. 
  • C、You should configure an automated server-side trace process on each instance, then use this process to store and delete performance data in a single database for all instances. 
  • D、You should create and schedule a single Microsoft SQL Service Integration Services (SSIS) package process, then use this process to store and delete performance data in a single database for all instances. 

正确答案:B

第8题：

You are the database administrator of a SQL Server 2000 computer. The server contains your company's Accounts database. Hundreds of users access the database each day.

Because you have had power interruptions in the past, you want to perfect the physical integrity of the Accounts database. You do not want to slow down server operations.

What should you do?

A．Enable the torn page detection database option for each database.

B．Disable write caching on all disk controllers.

C．Ensure that write caching disk controllers have battery backups.

D．Create a database maintenance plan to check database integrity and make repairs each night.


正确答案：C
解析：Explanation:Thescenariostatesthatpowerinterruptionshaveoccurredinthepast.Bybuyingabatterybackupsolutionforthediskcontrollersthepowerinterruptionproblemwouldbeprevented.IncorrectAnswers:A:Tornpagedetectionisareactivesolutionwhichwouldslowdownperformancesincerestoreswouldhavetobemade.Itwouldbettertouseapreventivesolution.Note:Tornpagedetection:Ifatornpageisdetected,thedatabasemustberestoredfrombackupbecauseitwillbephysicallyinconsistent.B:Cachingisveryimportforperformance.Disablingwrite-cachingwouldbeabadidea.D:Repairingthedatabaseeverynightisnotagoodsolution.Databaseerrorscannotbeaccepted.Itisbettertopreventtheprobleminsteadoftryingtofixitafterithashappened.

第9题：

You work in a company which is named Wiikigo Corp. The company uses SQL Server 2008. You are the administrator of the company database. Now you are in charge of a SQL Server 2008 instance. There is a SQL Server 7.0 database. You upgrade the database to the SQL Server instance. According to the company requirement, you must make sure that suspect pages can be detected in the database. So what action should you perform to achieve this goal?（）

  • A、For the database, you should turn on the TRUSTWORTHY database option
  • B、For the database, the PAGE_VERIFY database option should be set to CHECKSUM
  • C、For the database, the database compatibility level option should be set to 10
  • D、For the model database, the PAGE_VERIFY database option should be set to TORN_PAGE_DETECTION. 

正确答案:B

第10题：

You are a professional level SQL Server 2005 database administrator in an international corporation named Wiikigo. You are experienced in implementing high-availability solutions， monitoring the database server， and design deployment. In the company， you major job is the deployment， maintenance and support of Microsoft SQL Server 2005. You work as a database administrator for your company. There is a user in the Windows SalesManagers group， and he is called Simon. A Reporting Services report is required by Simon to have annual sales information displayed by territory. There is another user in the Windows Sales group， and he is called Jack. He is responsible to report to Simon. A report is required by Jack， and the report is limited to his sales territory， but the same detailed sales data is still displayed， and the detailed sales data is on Simon’s report. A secure solution should be designed to meet the requirements of the users listed above， and the least amount of server resources should be utilized.  Which action should be performed？（）

  • A、First， all territory information should be contained by a parameterized report which is designed for Simon. Second， a linked report that links to Simons report should be designed for Jack.
  • B、First， two data regions should be contained by a report which is designed for Simon. Second， one data region should be utilized for summary sales data. Third， the other data region should be utilized for the detailed sales data for each sales representative. Four， a report that displays the detailed sales data should be designed for Jack.
  • C、First， two reports should be designed for Simon. Second， the territory information should be contained by one， and the detailed sales data should be contained by another. At last， a report that displays the detailed sales data for Jack’s territories should be designed for Jack.
  • D、First， the territory information should be contained by a report which is designed for Simon. Second， a report which detailed sales data for Jack’s territories is contained should be designed for Jack. Third， Simon’s report should be set to have the data in Jacks report contained.

正确答案:A

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