It looks same even after deleting statistics.

Sanjay

Code:
fdbp1@FDBSD> analyze table rro compute statistics;

Table analyzed.

fdbp1@FDBSD> set autotrace on
fdbp1@FDBSD> select count(*) from rro;

  COUNT(*)
----------
     19752


Execution Plan
----------------------------------------------------------
   0      SELECT STATEMENT Optimizer=CHOOSE (Cost=69 Card=1)
   1    0   SORT (AGGREGATE)
   2    1     TABLE ACCESS (FULL) OF 'RRO' (Cost=69 Card=19752)




Statistics
----------------------------------------------------------
          0  recursive calls
          3  db block gets
        449  consistent gets
          0  physical reads
          0  redo size
        181  bytes sent via SQL*Net to client
        205  bytes received via SQL*Net from client
          3  SQL*Net roundtrips to/from client
          0  sorts (memory)
          0  sorts (disk)
          1  rows processed

fdbp1@FDBSD> select count(1) from rro;

  COUNT(1)
----------
     19752


Execution Plan
----------------------------------------------------------
   0      SELECT STATEMENT Optimizer=CHOOSE (Cost=69 Card=1)
   1    0   SORT (AGGREGATE)
   2    1     TABLE ACCESS (FULL) OF 'RRO' (Cost=69 Card=19752)




Statistics
----------------------------------------------------------
          0  recursive calls
          3  db block gets
        449  consistent gets
          0  physical reads
          0  redo size
        181  bytes sent via SQL*Net to client
        205  bytes received via SQL*Net from client
          3  SQL*Net roundtrips to/from client
          0  sorts (memory)
          0  sorts (disk)
          1  rows processed

fdbp1@FDBSD> analyze table rro delete statistics;

Table analyzed.

fdbp1@FDBSD> select count(*) from rro;

  COUNT(*)
----------
     19752


Execution Plan
----------------------------------------------------------
   0      SELECT STATEMENT Optimizer=CHOOSE
   1    0   SORT (AGGREGATE)
   2    1     TABLE ACCESS (FULL) OF 'RRO'




Statistics
----------------------------------------------------------
          0  recursive calls
          3  db block gets
        449  consistent gets
          0  physical reads
          0  redo size
        181  bytes sent via SQL*Net to client
        205  bytes received via SQL*Net from client
          3  SQL*Net roundtrips to/from client
          0  sorts (memory)
          0  sorts (disk)
          1  rows processed

fdbp1@FDBSD> 
fdbp1@FDBSD> select count(1) from rro;

  COUNT(1)
----------
     19752


Execution Plan
----------------------------------------------------------
   0      SELECT STATEMENT Optimizer=CHOOSE
   1    0   SORT (AGGREGATE)
   2    1     TABLE ACCESS (FULL) OF 'RRO'




Statistics
----------------------------------------------------------
          0  recursive calls
          3  db block gets
        449  consistent gets
          0  physical reads
          0  redo size
        181  bytes sent via SQL*Net to client
        205  bytes received via SQL*Net from client
          3  SQL*Net roundtrips to/from client
          0  sorts (memory)
          0  sorts (disk)
          1  rows processed

fdbp1@FDBSD>