CMS专题
多选题The ORDERS table in the database of a company contains one million records. The table is stored in the DATA tablespace and the index created on the ORDERS table is stored in the index tablespace named INDEXES. On Monday， you failed to start the databas
题目
PCTFREE
MAXTRANS
PCTINCREASE
INITIAL
NOLOGGING
PARALLEL
参考答案和解析
相似问题和答案
第1题：
You are the administrator of a SQL Server 2000 computer. The server contains your company's order processing database. Two-hundred operators take orders by telephone 24 hours a day. Threehundred data entry personnel enter data from orders received by mail.
To ensure that order data will not be lost, your company's disaster recovery policy requires that backups be written to tape. Copies of these tapes must be stored at an off-site company location. Orders must be entered into the database before they can be filled. If the server fails, you must be able to recover the order data as quickly as possible.
You need to create a backup strategy that meets the company requirements and minimizes server workload. Which two actions should you take? (Each correct answer represents part of the solution. Choose two.)
A．Perform. a combination of full database and filegroup backups.
B．Perform. a combination of full database and file backups.
C．Perform. a combination of full database, differential, and transaction log backups.
D．Back up the data to a local tape drive.
E．Back up the data to a network share, and then use enterprise backup software to write the disk backups to tape.
解析：Explanation:
C: Most OLTP backup schemes include a full database, differential, and transaction log backups
E: In order to recover the data as quickly as possibly we backup the data to network share, and then backup that share to tape. This minimizes the impact of the backup process on the SQL Server computer.
Note 1: SQL Server 2000 provides three database recovery models. These are the Simple recovery model, the Full Recovery Model and the Bulk-Logged Recovery model. Simple Recovery requires the least administration. In the Simple Recovery model, data is recoverable only to the last full database or differential backup. Transaction log backups are not used, and consequently, minimal transaction log space is required.
This Recovery Model is not an appropriate choice for production systems where loss of recent changes is unacceptable. Full Recovery and Bulk-Logged Recovery models provide the greatest protection for data. These models rely on the transaction log to provide full recoverability and to prevent work loss in the broadest range of failure scenarios.
The Full Recovery model provides the most flexibility for recovering databases to an earlier point in time. The Bulk-Logged model provides higher performance and lower log space consumption for certain large-scale operations. It does this at the expense of some flexibility of pointin- time recovery. In this scenario we would want to implement the Full Recovery model as this Recovery model provides complete protection against media failure and provides the ability to recover the database to the point of failure or to a specific point in time.
To guarantee this degree of recoverability, all operations are fully logged. The backup strategy for full recovery consists of database backups, differential backups, which are optional, and transaction log backups. The differential backups are optional but have less of an effect on the system while they run, as they are smaller than full database backups.
This is because a differential backup creates a copy of all the pages in a database modified after the last database backup. A transaction log backup makes a copy only of the log file and backs up the changes made to the database after the last full or differential database backup. A log file backup cannot be used by itself to restore a database. A log file is used after a database restore to recover the database to the point of the original failure. The full database, differential, and transaction log backups can be written to a hard disk or other disk storage media such as a tape drive.
Disk backup devices can be defined on a local disk of a server or on a remote disk on a shared network resource. Tape backup devices are used in the same way as disk devices, with the exception that the tape device must be connected physically to the computer running an instance of SQL Server. SQL Server 2000 thus does not support backing up to remote tape devices.
Note 2, file backup, filegroup backup: SQL Server 2000 supports backing up or restoring individual files or filegroups within a database. This is a complex backup and the restore process that is usually reserved for large databases with high availability requirements. If the time available for backups is not long enough to support backing up the full database, subsets of the database can be backed up at different times. If a disk holding database files or filegroups fails, the site can restore just the lost files or filegroups. This allows for a quicker recovery because only the damaged files or filegroups are restored in the first step, not the entire database.
Incorrect Answers:
A: An OLTP server requires transaction log backups in order to be able to recover up to the point of failure.
B: An OLTP server requires transaction log backups in order to be able to recover up to the point of failure.
D: Backing up to a local tape device would minimize cost but it would compared to a backup to a network it would decrease performance of the server more, and it would take more time to recover.
第2题：
Your company uses a SQL Server 2005 database. This database contains a trigger named trg_InsertOrders, which fires when order data is inserted into the Orders table. The trigger is responsible for ensuring that a customer exists in the Customers table before data is inserted into the Orders table. You need to configure the trigger to prevent it from firing during the data import process. You must accomplish this goal while using the least amount of administrative effort. Which two Transact-SQL statements can you use to achieve this goal?（）
- A、 ALTER TABLE OrdersDISABLE TRIGGER trg_InsertOrders
- B、 DROP TRIGGER trg_InsertOrders
- C、 DISABLE TRIGGER trg_InsertOrders ON Orders
- D、 ALTER TRIGGER trg_InsertOrders ON Orders NOT FOR REPLICATION
- E、 sp_settriggerorder@triggername= 'trg_InsertOrders', @order='None'
正确答案:A,C
第3题：
You execute the following commands to audit database activities:SQL >ALTER SYSTEM SET AUDIT_TRIAL=DB, EXTENDED SCOPE=SPFILE;SQL >AUDIT SELECT TABLE, INSERT TABLE, DELETE TABLE BY JOHN By SESSION WHENEVER SUCCESSFUL;Which statement is true about the audit record that generated when auditing after instance restarts?（）
A. One audit record is created for every successful execution of a SELECT, INSERT OR DELETE command on a table, and contains the SQL text for the SQL Statements.
B. One audit record is created for every successful execution of a SELECT, INSERT OR DELETE command, and contains the execution plan for the SQL statements.
C. One audit record is created for the whole session if john successfully executes a SELECT, INSERT, or DELETE command, and contains the execution plan for the SQL statements.
D. One audit record is created for the whole session if JOHN successfully executes a select command, and contains the SQL text and bind variables used.
E. One audit record is created for the whole session if john successfully executes a SELECT, INSERT,or DELETE command on a table, and contains the execution plan, SQL text, and bind variables used.
第4题：
You are performing flashback of the ORDERS table in the Scott’s schema because some important data is deleted in the table by mistake. The SCN number was 771513 at the time of deletion. You issued the following statement to perform Flashback Table： SQL> FLASHBACK TABLE ORDERS TO SCN 771513； What is the prerequisite to perform Flashback Table？（）
- A、 You must configure OMF in your database.
- B、 You must enable block change tracking feature in your database.
- C、 You must enable ROW MOVEMENT feature on the ORDERS table.
- D、 You must use the Flashback Version Query before using the Flashback Table feature.
正确答案:C
第5题：
You execute this command to drop the ITEM table， which has the primary key referred in the ORDERS table：SQL> DROP TABLE scott.item CASCADE CONSTRAINTS PURGE； Which two statements are true about theeffect of the command（）
- A、No flashback is possible to bring back the ITEM table.
- B、The ORDERS table is dropped along with the ITEM table.
- C、The dependent referential integrity constraints in the ORDERS table are disabled.
- D、The dependent referential integrity constraints in the ORDERS table are removed.
- E、The table definition of the ITEM table and associated indexes are placed in the recycle bin
正确答案:A,D
第6题：
B.Excel table]
C.Database]
D.Data dictionary
第7题：
You create a table in your database that contains 50，000 rows approximately. The queries performed on the table are complex and performed on the table frequently. Which advisor helps you achieve the best performance of database for queries by recommending the appropriate indexes？（）
- A、SQL Access Advisor
- B、 Memory Advisor
- C、SQL Tuning Advisor
- D、 Segment Advisor
正确答案:A
第8题：
You are the administrator of a SQL Server 2000 computer. The server contains confidential information about contracts on which your company has placed bids.
Company policy requires that bid information be removed permanently from the database one year after the bid closes. You need to comply with this policy and minimize server overhead.
What should you do?
A．Create a Data Transformation Services (DTS) package to remove bids that have a closing data older than one year.
B．Create a trigger to delete any bids that have a closing data older than one year. Bind the trigger to the bids table for all INSERT, UPDATE, and DELETE events.
C．Create a stored procedure to delete any bids that have a closing data order than one year. Use SQL server agent to schedule the stored procedure to run every night.
D．Create a view that contains a WHERE clause to exclude bids that have a closing date older than one year.
解析：Explanation:Thisscenariorequiresustoremoveoldinformationonaregularbasis.Firstwecreateastoredprocedurewhichremovesallrowswherethebidinformationdateisolderthanthecurrentdateminusoneyear.Thenweschedulethisproceduretoruneveryday.Wewouldthenbesuretoneverhaveanyrowsolderthanayearinthetable.Note:Storedproceduresalsoimproveperformanceasthestoredprocedureiscachedafteritisrun.ThisresultsinareductionofphysicalI/O.WecanfurtherreduceServeroverheadbyschedulingthestoredproceduretorunduringoff-peakhours.IncorrectAnswers:A:ADataTransformationServices(DTS)packageprovidesasetoftoolsthatallowsustoextract,transform,andconsolidatedatastoredinavarietyofformatsandindifferentlocationsintosingleormultipledestinationssupportedbyDTSconnectivity.Thissolutionisinappropriate,asthedataexistsontheserverandnotinnumerouslocationsandwouldthusbecorrectlyformattedforuseonaninstanceSQLServer2000.B:TriggersareaspecialtypeofstoredprocedurethatexecutesautomaticallywhenanUPDATE,INSERT,orDELETEstatementisrunagainstatableorview.Inthisscenariohowever,thedatestampofthedatainthedatabasemustbecheckedandthedatadeletedoneyearafterthebidhasclosed.Thiscannotbeaccomplishedthroughtheuseofconstraintsortriggers.D:Creatingaviewthatexcludesthebidsthathaveaclosingdateolderthanoneyeardoesnotaddressthecompanypolicythatrequiresthatbidinformationberemovedpermanentlyfromthedatabaseoneyearafterthebidcloses.Thisdatawillstillexistinthebasetables.
第9题：
Flashback Database is enabled in your Oracle 10g database. One of your database users erroneously purged an important table residing in his schema. The table was purged sometime between 10：00 P.M. and 10：30 P.M. The next day， you decide to flash back the database. Before you flash back the database， you want to ensure that you have all the necessary flashback data. Which dynamic performance view must you use to determine whether you have the required flashback data to recover the purged table？（）
- A、 V$DATABASE
- B、 V$UNDOSTAT
- C、 V$FLASHBACK_DATABASE_LOG
- D、 V$FLASHBACK_DATABASE_STAT
正确答案:C
第10题：
You work in a company which 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 database named named Dworks in the instance. The Dworks database has a table named Bills which contains several indexes and a great amount of rows. An enterprise Web environment is supported by the database. Onthe Bills table 28% of the indexes have been fragmented. You have to defragment the indexes， making sure that you reduce the effect on database availability to the least. In the ALTER INDEX statement， which option should be included？（）
- A、Sort in tempdb
- B、Online
- C、Fill factor
- D、Pad index
正确答案:B