网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
Examine the command： SQL> DBMS_STATS.SET_TABLE_PREFS（’SH’， ’CUSTOMERS’， ’PUBLISH’， ’false’）； Which statement describes the effect of the above command（）
A
Automatic statistics collection is stopped for the CUSTOMERS table.
B
Statistics for the CUSTOMERS table are locked and cannot be overwritten.
C
Existing statistics for the CUSTOMERS table become unusable for the query optimizer.
D
Subsequently， statistics gathered on the CUSTOMERS table are stored as pending statistics.
参考答案
参考解析
解析：
暂无解析
更多 “单选题Examine the command： SQL DBMS_STATS.SET_TABLE_PREFS（’SH’， ’CUSTOMERS’， ’PUBLISH’， ’false’）； Which statement describes the effect of the above command（）A Automatic statistics collection is stopped for the CUSTOMERS table.B Statistics for the CUSTOMERS table are locked and cannot be overwritten.C Existing statistics for the CUSTOMERS table become unusable for the query optimizer.D Subsequently， statistics gathered on the CUSTOMERS table are stored as pending statistics.” 相关考题
考题
View the Exhibit to examine the Automatic SQL Tuning result details.Which action would you suggest for the selected SQL statement in the Exhibit?()
A. Accept the recommended SQL profile.B.Collect statistics for the related objects.C. Run the Access Advisor for the SQL statement.D. Run the Segment Advisor for recommendations.
考题
You executed the following commands:Which statement is correct regarding the above statistics collection on the SH.CUSTOMERS table in the above session?()
A. The statistics are stored in the pending statistics table in the data dictionary.B. The statistics are treated as the current statistics by the optimizer for all sessions.C. The statistics are treated as the current statistics by the optimizer for the current sessions only.D. The statistics are temporary and used by the optimizer for all sessions until this session terminates.
考题
Examine the following command that is executed for the TRANSPORT table in the SH schema:Which statement describes the significance of this command?()
A. It collects statistics into the pending area in the data dictionaryB. It creates a virtual hidden column in the CUSTOMERS_OBE tableC. It collects statistics with AUTO_SAMPLE_SIZE for ESTIMATE_PERCENTD. It creates a histogram to hold skewed information about the data in the columns
考题
Youexecutedthefollowingcommands：SQLALTERSESSIONSETOPTIMIZER_USE_PENDING_STATISTICS=false；SQLEXECUTEDBMS_STATS.SET_TABLE_PREFS（’SH’，’CUSTOMERS’，’PUBLISH’，’false’）；SQLEXECUTEDBMS_STATS.GATHER_TABLE_STATS（’SH’，’CUSTOMERS’）；WhichstatementiscorrectregardingtheabovestatisticscollectionontheSH.CUSTOMERStableintheabovesession？（）A.Thestatisticsarestoredinthependingstatisticstableinthedatadictionary.B.Thestatisticsaretreatedasthecurrentstatisticsbytheoptimizerforallsessions.C.Thestatisticsaretreatedasthecurrentstatisticsbytheoptimizerforthecurrentsessionsonly.D.Thestatisticsaretemporaryandusedbytheoptimizerforallsessionsuntilthissessionterminates.
考题
Examine the data from the ORDERS and CUSTOMERS table.Which SQL statement retrieves the order ID, customer ID, and order total for the orders that are placed on the same day that Martin places his orders?（）A.B.C.D.
考题
Examinethecommand:SQLDBMS_STATS.SET_TABLE_PREFS(’SH’,’CUSTOMERS’,’PUBLISH’,’false’);Whichstatementdescribestheeffectoftheabovecommand()
A.AutomaticstatisticscollectionisstoppedfortheCUSTOMERStable.B.StatisticsfortheCUSTOMERStablearelockedandcannotbeoverwritten.C.ExistingstatisticsfortheCUSTOMERStablebecomeunusableforthequeryoptimizer.D.Subsequently，statisticsgatheredontheCUSTOMERStablearestoredaspendingstatistics
考题
While tuning a SQL statement, the SQL Tuning Advisor finds an existing SQL profile for the statement that has stale statistics available. What would the optimizer do in this situation?（）A、It updates the existing SQL profiles with current statisticsB、It makes the statistics information available to GATHER_STATS_JOBC、It initiates the statistics collection process by running GATHER_STATS_JOBD、It logs a warning message in the alert log so that the DBA can perform statistics collection manually
考题
While tuning a SQL statement, the SQL Tuning Advisor finds an existing SQL profile for the statement that has stale statistics available. What would the optimizer do in this situation?（）A、It updates the existing SQL profiles with current statistics.B、It makes the statistics information available to GATHER_STATS_JOBC、It initiates the statistics collection process by running GATHER_STATS_JOBD、It logs a warning message in the alert log so that the DBA can perform statistics collection manually.
考题
Examine the command： SQL DBMS_STATS.SET_TABLE_PREFS（’SH’， ’CUSTOMERS’， ’PUBLISH’， ’false’）； Which statementdescribes the effect of the above command（）A、Automatic statistics collection is stopped for the CUSTOMERS table.B、Statistics for the CUSTOMERS table are locked and cannot be overwritten.C、Existing statistics for the CUSTOMERS table become unusable for the query optimizer.D、Subsequently， statistics gathered on the CUSTOMERS table are stored as pending statistics
考题
You are working in an online transaction processing (OLTP) environment. You use the FLASHBACKTABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK TABLE command, the system change number (SCN) was 663571. After flashing back the CUSTOMERS table, you realize that the table is not in the correct state. Now, you need to reverse the effects of the FLASHBACK TABLE command. Which is the fastest and the most efficient option to reverse the effects of the FLASHBACK TABLE command?（）A、Restore the backup control file and open the database with RESETLOGS option.B、Perform point-in-time recovery because flashback cannot be performed again on this tableC、Execute the FLASHBACK DATABASE statement to retrieve the CUSTOMERS table as it was at SCN 663571D、Execute another FLASHBACK TABLE statement to retrieve the CUSTOMERS table as it was at SCN 663571
考题
You want to capture column group usage and gather extended statistics for better cardinality estimates for the CUSTOMERS table in the SH schema. Examine the following steps: 1. Issue the SELECT DBMS_STATS.CREATE_EXTENDED_STATS (‘SH’, ‘CUSTOMERS’) FROM dual statement. 2. Execute the DBMS_STATS.SEED_COL_USAGE (null, ‘SH’, 500) procedure. 3. Execute the required queries on the CUSTOMERS table. 4. Issue the SELECT DBMS_STATS.REPORT_COL_USAGE (‘SH’, ‘CUSTOMERS’) FROM dual statement. Identify the correct sequence of steps.（）A、3，2，1，4B、2，3，4，1C、4，1，3，2D、3，2，4，1
考题
You executed the following commands： SQL ALTER SESSION SET OPTIMIZER_USE_PENDING_STATISTICS = false； SQL EXECUTE DBMS_STATS.SET_TABLE_PREFS（’SH’， ’CUSTOMERS’， ’PUBLISH’，’false’）； SQL EXECUTE DBMS_STATS.GATHER_TABLE_STATS（’SH’， ’CUSTOMERS’）； Which statement is correct regarding the above statistics collection on the SH.CUSTOMERS table in the above session？（）A、 The statistics are stored in the pending statistics table in the data dictionary.B、 The statistics are treated as the current statistics by the optimizer for all sessions.C、 The statistics are treated as the current statistics by the optimizer for the current sessions only.D、 The statistics are temporary and used by the optimizer for all sessions until this session terminates.
考题
Examine this command: SQL exec DBMS_STATS.SET_TABLE_PREFS (‘SH’, ‘CUSTOMERS’, ‘PUBLISH’, ‘false’); Which three statements are true about the effect of this command?（）A、Statistics collection is not done for the CUSTOMERS table when schema stats are gathered.B、Statistics collection is not done for the CUSTOMERS table when database stats are gathered.C、Any existing statistics for the CUSTOMERS table are still available to the optimizer at parse time.D、Statistics gathered on the CUSTOMERS table when schema stats are gathered are stored as pending statistics.E、Statistics gathered on the CUSTOMERS table when database stats are gathered are stored as pending statistics.
考题
You are working in an online transaction processing （OLTP） environment. You used the FLASHBACK TABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK TABLE command， the System Change Number （SCN） was 663571. After flashing back the CUSTOMERS table， you realize that the table is not in the correct state and the resultant changes are not what you had desired. So， you need to reverse the effects of the FLASHBACK TABLE command while ensuring that： a） No other user data in the database is affected. b） The operation takes the minimum possible time. Which option would you choose？（）A、use the ROLLBACK command with SCN 663571B、perform Flashback Transaction Query with SCN 663571C、execute the FLASHBACK DATABASE statement to retrieve the CUSTOMERS table as it was at SCN 663571D、execute another FLASHBACK TABLE statement to retrieve the CUSTOMERS table as it was at SCN 663571
考题
Examine the command： SQL DBMS_STATS.SET_TABLE_PREFS（’SH’， ’CUSTOMERS’， ’PUBLISH’， ’false’）； Which statement describes the effect of the above command（）A、Automatic statistics collection is stopped for the CUSTOMERS table.B、Statistics for the CUSTOMERS table are locked and cannot be overwritten.C、Existing statistics for the CUSTOMERS table become unusable for the query optimizer.D、Subsequently， statistics gathered on the CUSTOMERS table are stored as pending statistics.
考题
单选题You want to capture column group usage and gather extended statistics for better cardinality estimates for the CUSTOMERS table in the SH schema. Examine the following steps: 1. Issue the SELECT DBMS_STATS.CREATE_EXTENDED_STATS (‘SH’, ‘CUSTOMERS’) FROM dual statement. 2. Execute the DBMS_STATS.SEED_COL_USAGE (null, ‘SH’, 500) procedure. 3. Execute the required queries on the CUSTOMERS table. 4. Issue the SELECT DBMS_STATS.REPORT_COL_USAGE (‘SH’, ‘CUSTOMERS’) FROM dual statement. Identify the correct sequence of steps.（）A
3，2，1，4B
2，3，4，1C
4，1，3，2D
3，2，4，1
考题
单选题You are working in an online transaction processing （OLTP） environment. You used the FLASHBACK TABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK TABLE command， the System Change Number （SCN） was 663571. After flashing back the CUSTOMERS table，you realize that the table is not in the correct state and the resultant changes are not what you had desired. So， you need to reverse the effects of the FLASHBACK TABLE command while ensuring that： a） No other user data in the database is affected. b） The operation takes the minimum possible time. Which option would you choose？（）A
use the ROLLBACK command with SCN 663571B
perform Flashback Transaction Query with SCN 663571C
execute the FLASHBACK DATABASE statement to retrieve the CUSTOMERS table as it was at SCN 663571D
execute another FLASHBACK TABLE statement to retrieve the CUSTOMERS table as it was at SCN 663571
考题
单选题You are working in an online transaction processing (OLTP) environment. You use the FLASHBACKTABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK TABLE command, the system change number (SCN) was 663571. After flashing back the CUSTOMERS table, you realize that the table is not in the correct state. Now, you need to reverse the effects of the FLASHBACK TABLE command. Which is the fastest and the most efficient option to reverse the effects of the FLASHBACK TABLE command?（）A
Restore the backup control file and open the database with RESETLOGS option.B
Perform point-in-time recovery because flashback cannot be performed again on this tableC
Execute the FLASHBACK DATABASE statement to retrieve the CUSTOMERS table as it was at SCN 663571D
Execute another FLASHBACK TABLE statement to retrieve the CUSTOMERS table as it was at SCN 663571
考题
多选题Examine this command: SQL exec DBMS_STATS.SET_TABLE_PREFS (‘SH’, ‘CUSTOMERS’, ‘PUBLISH’, ‘false’); Which three statements are true about the effect of this command?（）AStatistics collection is not done for the CUSTOMERS table when schema stats are gathered.BStatistics collection is not done for the CUSTOMERS table when database stats are gathered.CAny existing statistics for the CUSTOMERS table are still available to the optimizer at parse time.DStatistics gathered on the CUSTOMERS table when schema stats are gathered are stored as pending statistics.EStatistics gathered on the CUSTOMERS table when database stats are gathered are stored as pending statistics.
考题
单选题You design a Business Intelligence （BI） solution by using SQL Server 2008. You create a SQL Server 2008 Integration Services （SSIS） package to perform an extract， transform， and load （ETL） process to load data to a DimCustomer dimension table that contains 1 million rows. Your data flow uses the following components： A SQL Destination data flow task to insert new customers An OLE DB Command transform that updates existing customers On average， 25 percent of existing customer records is updated each night. You need to reduce the amount of time required to update customer records. What should you do？（）A
Modify the UPDATE statement in the OLE DB Command transform to use the PAGLOCK table hint. B
Modify the UPDATE statement in the OLE DB Command transform to use the TABLOCK table hint. C
Stage the data in the data flow. Replace the OLE DB Command transform in the data flow with an Execute SQL task in the control flow.D
Stage the data in the data flow. Replace the UPDATE statement in the OLE DB Command transform with a DELETE statement followed by an INSERT statement.
考题
单选题Which CLI command displays the PPPoE customers that are currently connected to the ERX?（）A
show usersB
show connectedC
show subscribersD
show ip subscribers
考题
单选题Examine the command： SQL DBMS_STATS.SET_TABLE_PREFS（’SH’， ’CUSTOMERS’， ’PUBLISH’， ’false’）； Which statementdescribes the effect of the above command（）A
Automatic statistics collection is stopped for the CUSTOMERS table.B
Statistics for the CUSTOMERS table are locked and cannot be overwritten.C
Existing statistics for the CUSTOMERS table become unusable for the query optimizer.D
Subsequently， statistics gathered on the CUSTOMERS table are stored as pending statistics
考题
单选题Examine the command： SQL DBMS_STATS.SET_TABLE_PREFS（’SH’， ’CUSTOMERS’， ’PUBLISH’， ’false’）； Which statement describes the effect of the above command（）A
Automatic statistics collection is stopped for the CUSTOMERS table.B
Statistics for the CUSTOMERS table are locked and cannot be overwritten.C
Existing statistics for the CUSTOMERS table become unusable for the query optimizer.D
Subsequently， statistics gathered on the CUSTOMERS table are stored as pending statistics.
考题
单选题While tuning a SQL statement, the SQL Tuning Advisor finds an existing SQL profile for the statement that has stale statistics available. What would the optimizer do in this situation?（）A
It updates the existing SQL profiles with current statisticsB
It makes the statistics information available to GATHER_STATS_JOBC
It initiates the statistics collection process by running GATHER_STATS_JOBD
It logs a warning message in the alert log so that the DBA can perform statistics collection manually
考题
单选题While tuning a SQL statement, the SQL Tuning Advisor finds an existing SQL profile for the statement that has stale statistics available. What would the optimizer do in this situation?（）A
It updates the existing SQL profiles with current statistics.B
It makes the statistics information available to GATHER_STATS_JOBC
It initiates the statistics collection process by running GATHER_STATS_JOBD
It logs a warning message in the alert log so that the DBA can perform statistics collection manually.
考题
单选题You are working in an online transaction processing （OLTP） environment. You used the FLASHBACK TABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK TABLE command， the System Change Number （SCN） was 663571. After flashing back the CUSTOMERS table， you realize that the table is not in the correct state and the resultant changes are not what you had desired. So， you need to reverse the effects of the FLASHBACK TABLE command while ensuring that： a） No other user data in the database is affected. b） The operation takes the minimum possible time. Which option would you choose？（）A
Use ROLLBACK command with SCN 663571.B
Perform Flashback Transaction Query with SCN 663571.C
Execute the FLASHBACK DATABASE statement to retrieve the CUSTOMERS table as it was at SCN 663571.D
Execute another FLASHBACK TABLE statement to retrieve the CUSTOMERS table as it was at SCN 663571.
考题
单选题You executed the following commands: Which statement is correct regarding the above statistics collection on the SH.CUSTOMERS table in the above session?（）A
The statistics are stored in the pending statistics table in the data dictionary.B
The statistics are treated as the current statistics by the optimizer for all sessions.C
The statistics are treated as the current statistics by the optimizer for the current sessions only.D
The statistics are temporary and used by the optimizer for all sessions until this session terminates.
考题
单选题You executed the following commands： SQL ALTER SESSION SET OPTIMIZER_USE_PENDING_STATISTICS = false； SQL EXECUTE DBMS_STATS.SET_TABLE_PREFS（’SH’， ’CUSTOMERS’， ’PUBLISH’，’false’）； SQL EXECUTE DBMS_STATS.GATHER_TABLE_STATS（’SH’， ’CUSTOMERS’）； Which statement is correct regarding the above statistics collection on the SH.CUSTOMERS table in the above session？（）A
The statistics are stored in the pending statistics table in the data dictionary.B
The statistics are treated as the current statistics by the optimizer for all sessions.C
The statistics are treated as the current statistics by the optimizer for the current sessions only.D
The statistics are temporary and used by the optimizer for all sessions until this session terminates.
热门标签
最新试卷