單項(xiàng)選擇題

Sales details are being stored on a daily basis in the SALES_2007 table. A large amount of data is added to the table daily. To save disk space, you issued the following command:
ALTER TABLE sales_2007 COMPRESS FOR ALL OPERATIONS;
What would be the outcome of this command?（）

A. It produces an error because data already exists in the table.
B. It produces an error because compression can be enabled at table creation only.
C. It compresses all data added or modified henceforth but the existing data in the table is not compressed immediately.
D. It immediately compresses all existing data as well as new data, resulting from either fresh additions or modifications to existing data.

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多項(xiàng)選擇題

Which two statements about the SQL Management Base (SMB) are true?（）

A. It contains only SQL profiles generated by SQL Tuning Advisor.
B. It stores plans generated by the optimizer using a stored outline.
C. It is part of the data dictionary and stored in the SYSAUX tablespace.
D. It is part of the data dictionary and stored in the SYSTEM tablespace.
E. It contains the statement log, the plan history, plan baselines, and SQL profiles.

多項(xiàng)選擇題

Which three statements correctly describe the features of the I/O calibration process?（）

A. Only one I/O calibration process can run at a time.
B. It automates the resource allocation for the Automated Maintenance Tasks.
C. It improves the performance of the performance-critical sessions while running.
D. It can be used to estimate the maximum number of I/Os and maximum latency time for the system.
E. The latency time is computed only when the TIMED_STATISTICS initialization parameter is set to TRUE.

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Sales details are being stored on a daily basis in the SALES_2007 table. A large amount of data is added to the table daily. To save disk space, you issued the following command: ALTER TABLE sales_2007 COMPRESS FOR ALL OPERATIONS; What would be the outcome of this command?（）

你可能感興趣的試題

Which two statements about the SQL Management Base (SMB) are true?（）

Which three statements correctly describe the features of the I/O calibration process?（）

Sales details are being stored on a daily basis in the SALES_2007 table. A large amount of data is added to the table daily. To save disk space, you issued the following command:
ALTER TABLE sales_2007 COMPRESS FOR ALL OPERATIONS;
What would be the outcome of this command?（）