oracle set命令
1.oracle set命令
1.set timing on
说明:设置显示“已用时间:XXXX”
SQL> select * from dual;
D
-
X
SQL> set timing on;
SQL> select * from dual;
D
-
X
已用时间: 00: 00: 00.00
SQL>
2.set autotrace on
说明:设置允许对执行的sql进行分析
SQL> set autotrace on;
SQL> select * from dual;
D
-
X
执行计划
----------------------------------------------------------
Plan hash value: 272002086
--------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
--------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 2 | 2 (0)| 00:00:01 |
| 1 | TABLE ACCESS FULL| DUAL | 1 | 2 | 2 (0)| 00:00:01 |
--------------------------------------------------------------------------
统计信息
----------------------------------------------------------
0 recursive calls
0 d