You are using flat files as the data source for one of your data warehousing applications. To optimizethe application performance, you plan to move the data from the flat files toclustered tablesin an Oracle database.  While migrating the data, you want t

题目

You are using flat files as the data source for one of your data warehousing applications. To optimizethe application performance, you plan to move the data from the flat files toclustered tablesin an Oracle database.  While migrating the data, you want to have minimal impact on the database performance and optimize thedata load operation. Which method would you use to load data into the Oracle database()

  • A、Use the external table population.
  • B、Use the Oracle Data Pump export and import utility.
  • C、Use the conventional path data load of the SQL*Loader utility.
  • D、Use the INSERT INTO...SELECT command to load the data.
参考答案和解析
正确答案:C
如果没有搜索结果或未解决您的问题,请直接 联系老师 获取答案。
相似问题和答案

第1题:

You are managing the APPPROD database as a DBA which is not using the Oracle-managed files. You plan to duplicate this database in the same system with the name DUPDB.You want to create the same directory structure for duplicate database files as of the target database.You executed the following RMAN commands:What are the implications of this command?()

A. It creates database files for the duplicate database under the Oracle base with a different directory for the duplicate database.

B. It overwrites data files of the target database because a different location for data files is not mentioned for the duplicate database.

C. It creates database files for the duplicate database under the same Oracle home as that of the target database with the same directory structure.

D. It creates database files for the duplicate database under the same Oracle home as that of the target but with a different directory for the duplicate database.


参考答案:B

第2题:

You work as an application developer at Certkiller .com. You are currently in the process of creating a new application for Certkiller .com. You are required to read compressed data files that has been sent by Certkiller .com‘s sales offices.These data files are less than 4 GB in size, but was compressed without cyclic redundancy. You want to write a method that receives the compressed files and return the uncompressed data as a byte array.What should you do?()

A.

B.

C.

D.


参考答案:A

第3题:

You are the administrator of several SQL Server 2000 computers. A data Transformation Services (DTS) package uses native OLE DB providers to transfer data between the servers. Connection details for the servers are specified in .udl files. The .udl files are frequently updated as connection details change.

You want to distribute the DTS package as a file to developers in your company. You want to make sure connection details are available to developers who receive the DTS package.

Which two tasks should you perform? (Each correct answer presents part of the solution. Choose two)

A.Enable the Always read properties from UDL file option in the Connection Properties dialog box.

B.Disable the Always read properties from UDL file option in the Connection Properties dialog box.

C.Delete the .udl files and store connection details in the registry by using system data source names.

D.Delete the .udl files, and store connection details in the registry by using user data source names.

E.Make the .udl files available on a network share.


正确答案:AE
解析:Explanation:
A: To make the connection information available for the developers we must enable the Always read properties from UDL file option.

E: We provide the developers with access to the .udl file by placing the .udl files in a network share and setting appropriate share and NTFS permissions.

Note: In SQL Server 2000, DTS packages can use Microsoft Data Link (.udl) files to create OLE DB connections and resolve the connections in run time. With this feature we can encapsulate the connection properties from a DTS package into a separate file and can edit the connection string in a .udl file instead of the connection properties in a DTS package in situations where connection information such as the server name, login, or even the OLE DB provider may change.

When specifying a data link connection, we must first specify whether to load an existing .udl file or create a data link to save with DTS Designer. If we want to use a .udl file rather than saving the data link with DTS Designer, we can create one either from Windows Explorer or during the data link configuration process in DTS Designer. We must then click Microsoft Data Link in the Data Source list of the Connection Properties dialog box and check the Always read properties from UDL file check box. In this scenario, the .udl file is already specified.

Incorrect Answers:
B: If we clear the Always read properties from UDL file option in the Connection Properties dialog box, we would have to edit the connection properties through the Data Transformation Services (DTS) package. This would increase administrative effort.

C: We cannot delete the .udl files and instead store the connection details in the registry by using system data source names as the connection details change regularly.

D: We cannot delete the .udl files, and instead store connection details in the registry by using user data source names as the connection details change regularly.

第4题:

In which case would you use a FULL OUTER JOIN?()

  • A、Both tables have NULL values.
  • B、You want all unmatched data from one table.
  • C、You want all matched data from both tables.
  • D、You want all unmatched data from both tables.
  • E、One of the tables has more data than the other.
  • F、You want all matched and unmatched data from only one table.

正确答案:D

第5题:

You have a large amount of historical data in a flat file. Some analysts in your organization need toquery this data in the file. The file is too large to load the data in it into your current database.  Which is the most effective method to access this data in your database()

  • A、Use the database link.
  • B、Use the SQL*Loader utility.
  • C、Use the Oracle Data Pump utility.
  • D、Create an external table and leave the data in the flat file

正确答案:D

第6题:

You are the administrator of a new multiprocessor SQL Server 2000 computer. You are migrating data from other database management systems to this server. You need to load data from two data files into a new table on the server. The table is empty and has no indexes.

You want to complete the data load as quickly as possible. What should you do? (Each correct answer represents part of the solution. Choose all that apply.)

A.Apply a bulk update lock to the table.

B.Use separate client connections to load the files into the table simultaneously.

C.Create a clustered index on the table.

D.Specify the Full Recovery model for the database.

E.Specify the Bulk-Logged Recovery model for the database.


正确答案:ABE
解析:Explanation:
A: Bulk update locks are taken when bulk copying data into a table and either the TABLOCK hint is specified, or the table lock on bulk load table option is set using sp_tableoption. Bulk update locks allow processes to bulk copy data concurrently into the same table while preventing other processes that are not bulk copying data from accessing the table. In this scenario the bulk update lock would meet the requirement that data should be loaded as quickly as possible.

B: SQL Server 2000 allows data to be bulk copied into a single table from multiple clients in parallel using the bcp utility or BULK INSERT statement. This can improve the performance of data load operations. To bulk copy data into an instance of SQL Server in parallel, the database must be set to Bulk-Logged Recovery, the TABLOCK hint must be specified, and the table must not have any indexes.

E: By specifying the Bulk-Logged Recovery model, the logging for all SELECT INTO, CREATE INDEX, and bulk loading data operations will be minimal and will therefore require less log space while also improving performance.

Incorrect Answers:
C: When data is bulk copied into a single table from multiple clients in parallel using the bcp utility or BULK INSERT statement to improve the performance of data load operations, the database must be set to Bulk-Logged Recovery, the TABLOCK hint must be specified, and the table must not have any indexes.

D: When data is bulk copied into a single table from multiple clients in parallel using the bcp utility or BULK INSERT statement to improve the performance of data load operations, the database must be set to Bulk-Logged Recovery, the TABLOCK hint must be specified, and the table must not have any indexes.

第7题:

You are using flat files as the data source for one of your data warehousing applications. To optimize the application performance, you plan to move the data from the flat files to clustered tables in an Oracle database.While migrating the data, you want to have minimal impact on the database performance and optimize the dataload operation.  Which method would you use to load data into the Oracle database()

  • A、Use the external table population.
  • B、Use the Oracle Data Pump export and import utility.
  • C、Use the conventional path data load of the SQL*Loader utility.
  • D、Use the INSERT INTO...SELECT command to load the data

正确答案:C

第8题:

Exhibit: You are developing a Web application. The Web application uses a GridView control to display data. You build your Web Forms for the Web application by dragging and dropping tables from the Data Connections tree in Server Explorer. You need to add a connection to your data by using the Add Connection dialog box as shown in the exhibit. During the process, you need to configure the .NET Data Provider that you use to create the data source objects. What should you do?()

A. Right-click the connection, and click Properties. Modify the Provider property of the data connection.

B. Click the Change button, and change the data provider for the selected data source.

C. Click the Advanced button, and change the Data Source property to the target provider.

D. Click the Advanced button, and change the Application Name property to the target provider.


参考答案:B

第9题:

In Recovery Manager (RMAN), you are taking image copies of the data files of your production database and rolling them forward at regular intervals. You attempt to restart your database. After a regular maintenance task, you realize that one of the data files that belongs to the USERS tablespace is damaged and you need to recover the data file by using the image copy. Because a media failure caused the data file to be damaged, you want to place the d ata file in a different location while restoring the file. Which option must you consider for this task?()

  • A、using only the RMAN SWITCH command to set the new location for the data file
  • B、placing the database in the MOUNT state for the restore and recovery operations.
  • C、using an RMAN RUN block with the SET NEWNAME and then the SWITCH command.
  • D、configuring two channels: one for the restore operation and the other for the recovery operation

正确答案:C

第10题:

You are using RMAN to perform a closed database backup of your database. You issue these RMAN commands: STARTUP MOUNT; BACKUP  FORMAT ’/BACKUP/df_%d_%s_%p.bus’  DATABASE filesperset = 2;  Which components are included in the backup?()

  • A、Only the data files.
  • B、Only the data files and the online logs.
  • C、The data files, control files, and the online logs.
  • D、The data files and control files, but not the online logs.

正确答案:D

更多相关问题