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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單項(xiàng)選擇題

In your production database, users report that they are unable to generate reports on an important table because it does not contain any data. While investigating the reason, you realize that another user executed the TRUNCATE TABLE command, which accidentally caused the data to be lost. Now you want to recover the lost data of the table without affecting objects in other schemas.
Which method must you use to recover the lost data?（）

A. Complete Recovery with online redo log
B. Complete Recovery with archived redo log
C. Tablespace Point-in-Time Recovery (TSPITR)
D. Incomplete Recovery with system change number (SCN)

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.

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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？（）

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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？（）