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On your Oracle 12c database, you Issue the following commands to create indexesSQL > 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.

参考答案

更多 “ On your Oracle 12c database, you Issue the following commands to create indexesSQL 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
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