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多选题
A warehouse fact table in your Oracle 12c Database is range-partitioned by month and accessed frequently with queries that span multiple partitions The table has a local prefixed, range partitioned index. Some of these queries access very few rows in some partitions and all the rows in other partitions, but these queries still perform a full scan for all accessed partitions. This commonly occurs when the range of dates begins at the end of a month or ends close to the start of a month. You want an execution plan to be generated that uses indexed access when only a few rows are accessed from a segment, while still allowing full scans for segments where many rows are returned. Which three methods could transparently help to achieve this result?（）
A
Using a partial local Index on the warehouse fact table month column with indexing disabled to the table partitions that return most of their rows to the queries.
B
Using a partial local Index on the warehouse fact table month column with indexing disabled for the table partitions that return a few rows to the queries.
C
Using a partitioned view that does a UNION ALL query on the partitions of the warehouse fact table, which retains the existing local partitioned column.
D
Converting the partitioned table to a partitioned view that does a UNION ALL query on the monthly tables, which retains the existing local partitioned column
E
Using a partial global index on the warehouse fact table month column with indexing disabling for the table partitions that return most of their rows to the queries.
F
Using a partial global index on the warehouse fact table month column with indexing disabled for the table partitions that return a few rows to the queries.
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更多 “多选题A warehouse fact table in your Oracle 12c Database is range-partitioned by month and accessed frequently with queries that span multiple partitions The table has a local prefixed, range partitioned index. Some of these queries access very few rows in some partitions and all the rows in other partitions, but these queries still perform a full scan for all accessed partitions. This commonly occurs when the range of dates begins at the end of a month or ends close to the start of a month. You want an execution plan to be generated that uses indexed access when only a few rows are accessed from a segment, while still allowing full scans for segments where many rows are returned. Which three methods could transparently help to achieve this result?（）AUsing a partial local Index on the warehouse fact table month column with indexing disabled to the table partitions that return most of their rows to the queries.BUsing a partial local Index on the warehouse fact table month column with indexing disabled for the table partitions that return a few rows to the queries.CUsing a partitioned view that does a UNION ALL query on the partitions of the warehouse fact table, which retains the existing local partitioned column.DConverting the partitioned table to a partitioned view that does a UNION ALL query on the monthly tables, which retains the existing local partitioned columnEUsing a partial global index on the warehouse fact table month column with indexing disabling for the table partitions that return most of their rows to the queries.FUsing a partial global index on the warehouse fact table month column with indexing disabled for the table partitions that return a few rows to the queries.” 相关考题
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The value for MINEXTENTS setting B
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The value for MAXEXTENTS setting D
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Use the external table population.B
Use the Oracle Data Pump export and import utility.C
Use the conventional path data load of the SQL*Loader utility.D
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Use the SQL*Loader utility.C
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Oracle Net ManagerB
Listener Control utilityC
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Oracle Net Configuration Assistant
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单选题You have a large amount of historical data in a flat file. Some analysts in your organization need toquery this data in the file. The file is too large to load the data in it into your current database. Which is the most effective method to access this data in your database（）A
Use the database link.B
Use the SQL*Loader utility.C
Use the Oracle Data Pump utility.D
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a table name which has 100s of recordsB
a table name which has 10s of recordsC
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a table name which has 1000s of recordsE
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多选题On your Oracle 12c database, you invoked SQL *Loader to load data into the EMPLOYEES table in the HR schema by issuing the following command: $ sqlldr hr/hr@pdb table=employees Which two statements are true regarding the command?（）AIt succeeds with default settings if the EMPLOYEES table belonging to HR is already defined in the database.BIt fails because no SQL *Loader data file location is specified.CIt fails if the HR user does not have the CREATE ANY DIRECTORY privilege.DIt fails because no SQL *Loader control file location is specified.
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use the external table populationB
use the Oracle Data Pump export and import utilityC
use the conventional path data load of SQL*Loader utilityD
use the direct path data load of Oracle export and import utility
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You can restore the DEPT table by using the Oracle Flashback Drop feature， provided you use the RENAME TO clause.B
You can restore the DEPT table by using the Oracle Flashback Drop feature and a systemgenerated name will be assigned to the restored table.C
You cannot restore the DEPT table by using the Oracle Flashback Drop feature because a table withthe name DEPT already exists in your schema.D
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单选题You find this query being used in your Oracle 12c database: Which method a used by the optimizer to limit the rows being returned?（）A
A filter is added to the table query dynamically using ROWNUM to limit the rows to 20 percent of the total rowsB
All the rows are returned to the client or middle tier but only the first 20 percent are returned to the screen or the application.C
A view is created during execution and a filter on the view limits the rows to 20 percent of the total rows.D
A TOP-N query is created to limit the rows to 20 percent of the total rows
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