SQL> select /*+ leading(emp,dept) usenl(emp) */ emp.*,dept.* from tb_emp03 emp,tb_dept03 dept where emp.deptno=dept.id;
执行计划
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Plan hash value: 960397288
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| Id | Operation | Name | Rows | Bytes |TempSpc| Cost (%CPU)| Time |
----------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1818K| 97M| | 8558 (1)| 00:01:43 |
|* 1 | HASH JOIN | | 1818K| 97M| 99M| 8558 (1)| 00:01:43 |
| 2 | TABLE ACCESS FULL| TB_EMP03 | 2000K| 76M| | 3601 (1)| 00:00:44 |
| 3 | TABLE ACCESS FULL| TB_DEPT03 | 10 | 160 | | 3 (0)| 00:00:01 |
----------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
1 - access("EMP"."DEPTNO"="DEPT"."ID")
SQL> select /*+ leading(emp,dept) usenl(dept) */ emp.*,dept.* from tb_emp03 emp,tb_dept03 dept where emp.deptno=dept.id;
执行计划
----------------------------------------------------------
Plan hash value: 960397288
----------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes |TempSpc| Cost (%CPU)| Time |
----------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1818K| 97M| | 8558 (1)| 00:01:43 |
|* 1 | HASH JOIN | | 1818K| 97M| 99M| 8558 (1)| 00:01:43 |
| 2 | TABLE ACCESS FULL| TB_EMP03 | 2000K| 76M| | 3601 (1)| 00:00:44 |
| 3 | TABLE ACCESS FULL| TB_DEPT03 | 10 | 160 | | 3 (0)| 00:00:01 |
----------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
1 - access("EMP"."DEPTNO"="DEPT"."ID")
