1.

What Is Explain Plan?

Answer»

From the BI side, you can basically use 2 TYPES of HINTS.

The Index hint instructs the optimizer to scan a specified index rather than a table.

The LEADING hint forces the optimizer to build the join order of a query with a specified table.

Importantly, the Explain Plan contains the following information regarding your query.

  • Ordering of the tables referenced
  • Access method for each table
  • Join method for each join operation
  • DATA operations, such as filter, sort or aggregation

And in addition:

  • Optimization (Cost and Cardinality)
  • Partitioning
  • Parallel Execution

From the BI side, you can basically use 2 types of hints.

The Index hint instructs the optimizer to scan a specified index rather than a table.

The Leading hint forces the optimizer to build the join order of a query with a specified table.

Importantly, the Explain Plan contains the following information regarding your query.

And in addition:



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