what is explain plan?, given an example...
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Answer Posted / shivainduja
An explain plan is a representation of the access path that
is taken when a query is executed within Oracle.
SQL> explain plan for select * from emp2;
Explained.
SQL> select * from table (DBMS_XPLAN.display);
PLAN_TABLE_OUTPUT
-------------------------------------
Plan hash value: 2941272003
--------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost
(%CPU)| Time |
--------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 15 | 570 | 3
(0)| 00:00:01 |
| 1 | TABLE ACCESS FULL| EMP2 | 15 | 570 | 3
(0)| 00:00:01 |
--------------------------------------------------------------------------
8 rows selected.
| Is This Answer Correct ? | 4 Yes | 1 No |
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