In which scenarios would you rebuild an index?()

题目
多选题
In which scenarios would you rebuild an index?()
A

when you need to disable the index usage

B

when you need to change storage options

C

when you need to enable index monitoring

D

when you need to move the index to another tablespace

参考答案和解析
正确答案: D,B
解析: 暂无解析
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相似问题和答案

第1题:

While designing the database for one of your online transaction processing (OLTP) applications, you want to achieve the following:  a) high availability of data  b) faster primary key access to the table data  c) compact storage for the table  Which type of tables would you use to achieve these objectives?() 

  • A、heap tables
  • B、object tables
  • C、partitioned tables
  • D、index-organized tables (IOTs)

正确答案:D

第2题:

You moved the index EMP_NO_INDX from one tablespace to another and then issued the following command to rebuild the index EMP_NO_INDX:   SQL> ALTER INDEX EMP_NO_INDX REBUILD ONLINE;   Which table allows the users to access the EMP_NO_INDX index while performing the rebuild operation?() 

  • A、 Index-organized table
  • B、 Mapping Table
  • C、 Clustered Table
  • D、 Journal Table

正确答案:D

第3题:

Examine the SQL statements that creates ORDERS table:For which columns would an index be automatically created when you execute the above SQL statement? ()

A. SER_NO

B. ORDER_ID

C. STATUS

D. PROD_ID

E. ORD_TOTAL

F. Composite index on ORDER_ID and ORDER_DATE


参考答案:A, F

第4题:

You issued the following statement to monitor the usage of the index:        SQL> ALTER INDEX SCOTT.EMP_IDX MONITORING USAGE;   Which view will you query to ensure that the index is being monitored?()  

  • A、 INDEX_STATS
  • B、 DBA_INDEXES
  • C、 DBA_IND_COLUMNS
  • D、 V$OBJECT_USAGE

正确答案:D

第5题:

You executed the following procedure to collect statistics regarding an index:       SQL>ANALYZE INDEX EMP_ID VALIDATE STRUCTURE;   Which view will you use to determine whether you need to rebuild the index or not?() 

  • A、 INDEX_STATS
  • B、 DBA_INDEXES
  • C、 DBA_IND_COLUMNS
  • D、 V$OBJECT_USAGE

正确答案:A

第6题:

Evaluate the CREATE TABLE statement:   CREATE TABLE products   (product_id NUMBER (6)  CONSTRAINT prod_id_pk PRIMARY KEY,  product_name VARCHAR2 (15));   Which statement is true regarding the PROD_ID_PK constraint?()

  • A、 It would be created only if a unique index is manually created first.
  • B、 It would be created and would use an automatically created unique index.
  • C、 It would be created and would use an automatically created nonunique index.
  • D、 It would be created and remains in a disabled state because no index is specified in the command.

正确答案:B

第7题:

You noticed that the index tablespace in your database requires a recovery. However, instead of performing a media recovery, you decided to re/x7fcreate the indexes in a new tablespace. Which two options would you use to reduce the time it takes to re/x7fcreate the indexes?()

  • A、ONLINE
  • B、REVERSE
  • C、PARALLEL
  • D、COMPRESS
  • E、NOLOGGING
  • F、COMPUTE STATISTICS

正确答案:C,E

第8题:

Identify three scenarios in which you would recommend the use of SQL Performance Analyzer to analyzeimpact on the performance of SQL statements.()

A. Change in the Oracle Database version

B. Change in your network infrastructure

C. Change in the hardware configuration of the database server

D. Migration of database storage from non-ASM to ASM storage

E. Database and operating system upgrade


参考答案:A, C, E

第9题:

You noticed that the index tablespace in your database requires a recovery. However, instead of performing a media recovery, you decided to re-create the indexes in a new tablespace. Which two options would you use to reduce the time it takes to re-create the indexes?()

  • A、 ONLINE
  • B、 REVERSE
  • C、 PARALLEL
  • D、 COMPRESS
  • E、 NOLOGGING
  • F、 COMPUTE STATISTICS

正确答案:C,E

第10题:

Identify three scenarios in which you would recommend the use of SQL Performance Analyzer to analyzeimpact on the performance of SQL statements.()

  • A、Change in the Oracle Database version
  • B、Change in your network infrastructure
  • C、Change in the hardware configuration of the database server
  • D、Migration of database storage from non-ASM to ASM storage
  • E、Database and operating system upgrade

正确答案:A,C,E

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