scott 下 dept表
SQL> select * from dept where deptno >'30';
DEPTNO DNAME LOC
---------- -------------- -------------
40 OPERATIONS BOSTON
50 ACCOUNTING NEW YORK
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Tim
e |
--------------------------------------------------------------------------------
-------
| 0 | SELECT STATEMENT | | 3 | 60 | 2 (0)| 00:
00:01 |
| 1 | TABLE ACCESS BY INDEX ROWID| DEPT | 3 | 60 | 2 (0)| 00:
00:01 |
|* 2 | INDEX RANGE SCAN | PK_DEPT | 3 | | 1 (0)| 00:
00:01 |
SQL> select * from dept where deptno <> '30';
DEPTNO DNAME LOC
---------- -------------- -------------
50 ACCOUNTING NEW YORK
20 RESEARCH DALLAS
40 OPERATIONS BOSTON
--------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
--------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 3 | 60 | 3 (0)| 00:00:01 |
|* 1 | TABLE ACCESS FULL| DEPT | 3 | 60 | 3 (0)| 00:00:01 |
--------------------------------------------------------------------------
