oracle,Cannot SET AUTOTRACE解决问题

1、SET AUTOTRACE参数

SET AUTOTRACE OFF ---------------- 不生成AUTOTRACE 报告，这是缺省模式
SET AUTOTRACE ON EXPLAIN ------ AUTOTRACE只显示优化器执行路径报告
SET AUTOTRACE ON STATISTICS -- 只显示执行统计信息
SET AUTOTRACE ON ----------------- 包含执行计划和统计信息
SET AUTOTRACE TRACEONLY ------ 同set autotrace on，但是不显示查询输出

2、只能在sql plus下执行

SQL> SET AUTOTRACE ON;
SQL> select count(*) from oz_member;

COUNT(*)
----------
472

执行计划
----------------------------------------------------------

-------------------------------------------------------
| Id | Operation | Name | Rows | Cost (%CPU)|
-------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 1 (0)|
| 1 | SORT AGGREGATE | | 1 | |
| 2 | INDEX FULL SCAN| PK1_1 | 472 | 1 (0)|
-------------------------------------------------------

Note
-----
- 'PLAN_TABLE' is old version

统计信息
----------------------------------------------------------
193 recursive calls
0 db block gets
34 consistent gets
0 physical reads
0 redo size
409 bytes sent via SQL*Net to client
385 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
1 rows processed、