Explain Plan Setup

SQL*Plus: Release 9.2.0.1.0 - Production on Thu Oct 29 14:46:26 2009
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1. Creation of the plan table.
SQL> @E:\TestDB\rdbms\admin\utlxplan.sql
Table created.
SQL> create table t( num number(2));
Table created.
SQL> delete from plan_table;
0 rows deleted.
2. Collect the plan for SQL script.
SQL> explain plan for 2 select * from t where num = 2;
Explained.
3. View the Explain plan.

SQL> @E:\TestDB\rdbms\admin\utlxpls
PLAN_TABLE_OUTPUT
--------------------------------------------------------------------------------

--------------------------------------------------------------------
Id Operation Name Rows Bytes Cost
--------------------------------------------------------------------
0 SELECT STATEMENT
* 1 TABLE ACCESS FULL T
--------------------------------------------------------------------

Predicate Information (identified by operation id):---------------------------------------------------
PLAN_TABLE_OUTPUT
--------------------------------1 - filter("T"."NUM"=2)
Note: rule based optimization
14 rows selected.
SQL>