autotrace count(*) : autotrace « SQL Plus « Oracle PL / SQL

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Oracle PL / SQL » SQL Plus » autotrace 
autotrace count(*)
  

SQL>
SQL> create table t as select from all_objects;

Table created.

SQL>
SQL> set autotrace on
SQL> select count(*from t;

  COUNT(*)
----------
     12586


Execution Plan
----------------------------------------------------------
Plan hash value: 2966233522

-----------------------------------
| Id  | Operation          | Name |
-----------------------------------
|   SELECT STATEMENT   |      |
|   |  SORT AGGREGATE    |      |
|   |   TABLE ACCESS FULL| T    |
-----------------------------------

Note
-----
   - rule based optimizer used (consider using cbo)


Statistics
----------------------------------------------------------
          1  recursive calls
          0  db block gets
        163  consistent gets
        159  physical reads
          0  redo size
        413  bytes sent via SQL*Net to client
        380  bytes received via SQL*Net from client
          2  SQL*Net roundtrips to/from client
          0  sorts (memory)
          0  sorts (disk)
          1  rows processed

SQL>
SQL>
SQL> set autotrace off
SQL>
SQL> delete from where owner <> 'SCOTT';

12586 rows deleted.

SQL>
SQL> set autotrace on
SQL> select count(*from t;

  COUNT(*)
----------
         0


Execution Plan
----------------------------------------------------------
Plan hash value: 2966233522

-----------------------------------
| Id  | Operation          | Name |
-----------------------------------
|   SELECT STATEMENT   |      |
|   |  SORT AGGREGATE    |      |
|   |   TABLE ACCESS FULL| T    |
-----------------------------------

Note
-----
   - rule based optimizer used (consider using cbo)


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

SQL>
SQL>
SQL> set autotrace off
SQL> alter table t move;

Table altered.

SQL> set autotrace on
SQL> select count(*from t;

  COUNT(*)
----------
         0


Execution Plan
----------------------------------------------------------
Plan hash value: 2966233522

-----------------------------------
| Id  | Operation          | Name |
-----------------------------------
|   SELECT STATEMENT   |      |
|   |  SORT AGGREGATE    |      |
|   |   TABLE ACCESS FULL| T    |
-----------------------------------

Note
-----
   - rule based optimizer used (consider using cbo)


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

SQL>
SQL> set autotrace off
SQL>
SQL> drop table t;

Table dropped.

   
    
  
Related examples in the same category
1. autotrace command
2. Autotrace on and off
3. Autotrace lower text function
4. Autotrace running total
5. Autotrace a query on a huge table
6. Autotrace a large table
7. Autotrace a query with group clause
8. Execution Plan
9. autotrace a nested query
10. set autotrace on explain for every single statement
11. set autotrace traceonly explain for bitmap index
12. set autotrace traceonly explain, and condition
13. set autotrace traceonly statistics
14. set autotrace traceonly statistics for 'select * from tableName'
15. set autotrace traceonly
16. AUTOTRACE exists (subquery)
17. AUTOTRACE table joining
18. AUTOTRACE table joining and aggregate function
19. autotrace ansi full outer join
20. autotrace ctxsys.context index
21. autotrace merge command
22. autotrace table with/without an index
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