多項選擇題

Which two statements are correct about database transportation？（）

A. The source and target platforms must be the same
B. Redo logs，control files and temp files are also transported
C. The transported database must have the same database identifier （DBID） as the source database and cannot be changed
D. The COMPATIBLE parameter must be set to 10.0.0.0 or higher and the database must be opened in readonly mode before being transported
E. Recovery Manager （RMAN） is used to convert the necessary data files of the database if the target platform is different and has different endian format

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多項選擇題

Which two statements are true with respect to the maintenance window？（） .

A. A DBA can enable or disable an individual task in all maintenance windows.
B. A DBA cannot change the duration of the maintenance window after it is created.
C. In case of a long maintenance window，all Automated Maintenance Tasks are restarted every four hours.
D. A DBA can control the percentage of the resource allocated to the Automated Maintenance Tasks in each window

單項選擇題

You have a range-partitioned table in your database. Each partition in the table contains the sales data for a quarter.
The partition related to the current quarter is modified frequently and other partitions undergo fewer data manipulations. The preferences for the table are set to their default values. You collect statistics for the table using the following command in regular intervals： SQL> EXECUTE
DBMS_STATS.GATHER_TABLE_STATS（’SH’，’SALES’，GRANULARITY=>’GLOBAL’）；
You need statistics to be collected more quickly.
What can you do to achieve this？（）

A. Set DYNAMIC_SAMPLING to level 4
B. Set the STATISTICS_LEVEL parameter to BASIC
C. Set the INCREMENTAL value to TRUE for the partition table
D. Increase the value of STALE_PERCENT for the partition table

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Which two statements are correct about database transportation？（）

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Which two statements are true with respect to the maintenance window？（） .

Which two statements are correct about database transportation？（）

Which two statements are true with respect to the maintenance window？（） .