復制代碼 代碼如下:

SQL> set timing on;
SQL> select count(*) from wea;

COUNT(*)
----------
39490

已用時間: 00: 00: 00.06
SQL> select sql_text, elapsed_time from v$sql
2 where sql_text like 'select count(*) from wea';

未選定行

已用時間: 00: 00: 00.25