Define the explaining plan and its used

Question

Define the explaining plan and how is this used?

Answer 1

EXPLAIN PLAN:

This command is a tool to tune SQL statements. Here to use it you should have an explain_table generated within the user you are running the explain plan intended for. It is created using the utlxplan.sql script. When the explain plan table subsists you run the explain plan command providing as its argument the SQL statement to be described. The explain_plan table is after that queried to see the execution plan of the statement. This plans can also be run by using tkprof.