多项选择题
You want to use the SQL Tuning Advisor to generate recommendations for badly written SQL statements in your development environment. Which three sources can you select for the advisor to analyze？（）
A. Top SQL
B. snapshots
C. SQL Tuning sets
D. index access path
E. optimizer statistics
F. materialized view logs
相关考题
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单项选择题
YouaremanaginganOracleDatabase10gdatabasethatusesOracleManagedFiles（OMF）.Youenabledtheblockchangetrackingfeatureforthedatabase.Whichstatementregardingthechangetrackingfileistrue？（）
A. One block change tracking file is created for each data file. By default， the file is created in DB_CREATE_FILE_DEST.
B. One block change tracking file is created for each data file. By default， the file is created in BACKGROUND_DUMP_DEST.
C. One block change tracking file is created for the database. By default， the file is created in DB_CREATE_FILE_DEST.
D. One block change tracking file is created for the database. By default， the file is created in BACKGROUND_DUMP_DEST. -
单项选择题
You execute the following command to enable a session in resumable mode： SQL> ALTER SESSION ENABLE RESUMABLE TIMEOUT 60； What is the impact of a timeout on the statements being suspended？（）
A. The statements remain suspended for at least 60 seconds.
B. The statements are suspended for 60 seconds and then they are executed.
C. The suspended statements error out if the problem is not rectified within 60 seconds.
D. The statements are automatically suspended 60 seconds after an error is received， and then attempt to execute normally again. -
单项选择题
Inyourtestdatabase，youfindthatauser’ssessionisexecutingalotofSQLstatements，resultinginthegenerationofalargenumberoftracefiles.Whileinvestigatingthereason，youfindthatSQLtracehasbeenenabledattheinstancelevel.YouwanttodisableSQLtrace，remotely，onlyforthatusersessiontoreducethevolumeoftracedatabeinggenerated.Howdoyouachievethisobjective？（）
A. by setting the SQL_TRACE parameter to FALSE in the parameter file
B. by using DBMS_MONITOR.SESSION_TRACE_DISABLE to disable the tracing for the user session
C. by setting the SQL_TRACE parameter to FALSE by using the ALTER SYSTEM command in the user session
D. by setting the SQL_TRACE parameter to FALSE by using the ALTER SESSION command in the user session
