0 recursive calls
0 db block gets
-- 3 consistent gets
-- 3 physical reads
0 redo size
465 bytes sent via SQL*Net to client
508 bytes received via SQL*Net from client
1 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
0 rows processed
SQL> select * from t1 where rn=100;
RN
----------
NAME1
----------------------------------------------------------------------------------------------------
NAME2
----------------------------------------------------------------------------------------------------
100
IWKRROMDHLNJMXVQYRHE
VPTNTMMUJYJJQCM
已用时间: 00: 00: 00.00
执行计划
----------------------------------------------------------
Plan hash value: 1704772559
------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 4017 | 4 (0)| 00:00:01 |
| 1 | TABLE ACCESS BY INDEX ROWID| T1 | 1 | 4017 | 4 (0)| 00:00:01 |
|* 2 | INDEX RANGE SCAN | I1 | 1 | | 3 (0)| 00:00:01 |
------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
2 - access("RN"=100)
Note
-----
- dynamic sampling used for this statement (level=2)
统计信息
----------------------------------------------------------
0 recursive calls
0 db block gets
-- 5 consistent gets
-- 4 physical reads
0 redo size
696 bytes sent via SQL*Net to client
519 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
1 rows processed
SQL> select count(name1) from t1 where rn<100;
COUNT(NAME1)
------------
49
已用时间: 00: 00: 00.00
执行计划
----------------------------------------------------------
Plan hash value: 3625400295
-------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
-------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 2015 | 4 (0)| 00:00:01 |
| 1 | SORT AGGREGATE | | 1 | 2015 | | |
| 2 | TABLE ACCESS BY INDEX ROWID| T1 | 49 | 98735 | 4 (0)| 00:00:01 |
|* 3 | INDEX RANGE SCAN | I1 | 49 | | 3 (0)| 00:00:01 |
-------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
3 - access("RN"<100)
Note
-----
- dynamic sampling used for this statement (level=2)
统计信息
----------------------------------------------------------
0 recursive calls
0 db block gets
-- 4 consistent gets --
-- 4 physical reads --
0 redo size
531 bytes sent via SQL*Net to client
519 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
1 rows processed
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