如何看懂ORACLE执行计划

原作者：http://www.verydemo.com/demo_c158_i47541.html

Index Lookup (unique & non-unique)   
Rowid   

When looking at a plan, the rightmost (ie most inndented) uppermost operation is the first thing that is executed.

10TABLE ACCESS* (FULL) OF 'EMP' (Cost=1 Card=82 Bytes=7134):Q5000

1 PARALLEL_TO_SERIALSELECT /*+ NO_EXPAND ROWID(A1) */ A1."EMPNO"

…………………………………………………………………………