标签:cte select ges -- exp ash name display state
SQL> set linesize 10000;
SQL> set pagesize 10000;
SQL> explain plan for select * from dual;
Explained.
之后使用dbms_xplan工具包将生成的执行计划展示出来。
SQL> select * from table(dbms_xplan.display);
PLAN_TABLE_OUTPUT
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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 |
--------------------------------------------------------------------------
8 rows selected.
标签:cte select ges -- exp ash name display state
原文地址:https://www.cnblogs.com/xyarn/p/9773599.html