On your Oracle 12c database, you Issue the following commands to create indexes SQL CREATE INDEX oe.ord_customer_ix1 ON oe.orders (customers_id, sales_rep_id) INVISIBLE; SQL CREATE BITMAP INDEX oe.ord_customer_ix2 ON oe.orders (customers_id, sales_rep_id); Which two statement are correct?（）A、Both the indexes are created; however, only the ORD_COSTOMER index is visible.B、The optimizer evaluates index access from both the Indexes before deciding on which index to use for query execution plan.C、Only the ORD_CUSTOMER_IX1 index is created.D、Only the ORD_CUSTOMER_IX2 index is created.E、Both the indexes are updated when a new row is inserted, updated, or deleted In the orders table.
On your Oracle 12c database, you Issue the following commands to create indexes SQL > CREATE INDEX oe.ord_customer_ix1 ON oe.orders (customers_id, sales_rep_id) INVISIBLE; SQL> CREATE BITMAP INDEX oe.ord_customer_ix2 ON oe.orders (customers_id, sales_rep_id); Which two statement are correct?（）
- A、Both the indexes are created; however, only the ORD_COSTOMER index is visible.
- B、The optimizer evaluates index access from both the Indexes before deciding on which index to use for query execution plan.
- C、Only the ORD_CUSTOMER_IX1 index is created.
- D、Only the ORD_CUSTOMER_IX2 index is created.
- E、Both the indexes are updated when a new row is inserted, updated, or deleted In the orders table.
相关考题：
While designing your database， you have created the EMPLOYEES table as an index/x7forganized table （IOT）. You want to create a bitmap index on the JOB_ID column to make queries faster. Which task must have been completed so that you are able to create the bitmap index？（）A、A primary key must have been created.B、A mapping table must have been created.C、An overflow tablespace must have been specified.D、The PCTTHRESHOLD option must have been specified.
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多选题On your Oracle 12c database, you Issue the following commands to create indexes SQL CREATE INDEX oe.ord_customer_ix1 ON oe.orders (customers_id, sales_rep_id) INVISIBLE; SQL CREATE BITMAP INDEX oe.ord_customer_ix2 ON oe.orders (customers_id, sales_rep_id); Which two statement are correct?（）ABoth the indexes are created; however, only the ORD_COSTOMER index is visible.BThe optimizer evaluates index access from both the Indexes before deciding on which index to use for query execution plan.COnly the ORD_CUSTOMER_IX1 index is created.DOnly the ORD_CUSTOMER_IX2 index is created.EBoth the indexes are updated when a new row is inserted, updated, or deleted In the orders table.
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多选题You lost the index tablespace in your database. You decided to re-create the index tablespace and the indexes in the tablespace. What methods can you use to re-create the indexes？（）ASQL scriptsBRecovery Manager （RMAN） scriptCData PumpDSQL*LoaderEFlashback database
单选题While designing your database， you have created the EMPLOYEES table as an index/x7forganized table （IOT）. You want to create a bitmap index on the JOB_ID column to make queries faster. Which task must have been completed so that you are able to create the bitmap index？（）AA primary key must have been created.BA mapping table must have been created.CAn overflow tablespace must have been specified.DThe PCTTHRESHOLD option must have been specified.
多选题You noticed that the index tablespace in your database requires a recovery. However， instead of performing a media recovery， you decided to re-create the indexes in a new tablespace. Which two options would you use to reduce the time it takes to re-create the indexes？（）AONLINEBREVERSECPARALLELDCOMPRESSENOLOGGINGFCOMPUTE STATISTICS