Question

When setting optimizer hints, _____ instructs the optimizer to minimize the overall execution time, that is, to minimize the time it takes to return the total number of rows in the query result set. This hint is generally used for batch mode processes.

Answer 1

Answer:

ALL_ROWS

Explanation:

The ALL_ ROWS hint instructs the optimizer to optimize a statement block with a minimum total resource consumption goal. The optimizer, for example, uses the request optimization technique to optimize this claim for best performance:

In the event that you indicate either the ALL_ROWS or the FIRST_ROWS insight in a SQL explanation, and if the information word reference doesn't have measurements about tables gotten to by the announcement, at that point the streamlining agent uses default factual qualities, for example, designated capacity for such tables, to assess the missing insights and to in this manner pick an execution plan. These evaluations probably won't be as exact as those accumulated by the DBMS_STATS bundle, so you should utilize the DBMS_STATS bundle to assemble insights.