Help Reqd in SQL Syntax

Question

Hi,
I am using the following statement:
select * from table1 where field1 = 'a' and rownum <= 10;
After I execute this statement SQL Plus gets stuck,
I am not able to figure out what I am doing wrong here,
Please advice,
Thanks,
Raja

Answer 1

Alright you may have to CTRL+C that thing. Anyway, here is a very simple example of how explain plan works:
SQL*Plus: Release 10.2.0.2.0 - Production on Mon May 12 10:51:46 2008
Copyright (c) 1982, 2005, Oracle.  All Rights Reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options
SQL> explain plan for select * from dual;
Explained.
SQL> select * from table(dbms_xplan.display);
PLAN_TABLE_OUTPUT
Plan hash value: 3543395131
| Id  | Operation         | Name | Rows  | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT  |      |     1 |     2 |     2   (0)| 00:00:01 |
|   1 |  TABLE ACCESS FULL| DUAL |     1 |     2 |     2   (0)| 00:00:01 |
8 rows selected.
SQL>