--------------------------------------------------------------------------------
 
| Id  | Operation             | Name     | Rows  | Bytes | Cost (%CPU)| Time
--------------------------------------------------------------------------------
 
|   0 | SELECT STATEMENT      |          |     8 |   280 |     4   (0)| 00:00:01
 
|   1 |  NESTED LOOPS         |          |     8 |   280 |     4   (0)| 00:00:01
 
|   2 |   INDEX FAST FULL SCAN| INDEX_T  |  1921 | 34578 |     4   (0)| 00:00:01
 
|*  3 |   INDEX RANGE SCAN    | INDEX_T1 |     1 |    17 |     0   (0)| 00:00:01
 
--------------------------------------------------------------------------------
 
 
Predicate Information (identified by operation id):
---------------------------------------------------
 
   3 - access("A"."TABLE_NAME"="B"."TABLE_NAME")
 
Note
-----
   - dynamic sampling used for this statement (level=2)
 
 
统计信息
----------------------------------------------------------
          0  recursive calls
          0  db block gets
         18  consistent gets
          0  physical reads
          0  redo size
        807  bytes sent via SQL*Net to client
        415  bytes received via SQL*Net from client
          2  SQL*Net roundtrips to/from client
          0  sorts (memory)
          0  sorts (disk)
          8  rows processed
 
SQL> select a.table_name,b.table_name from t1 a,t b
  2  where a.table_name = b.table_name;