Oracle执行计划——all_rows和first_rows(n) 优化器模式
摘要:
0. 环境创建SQL> create usertest identified by test 2 default tablespace users 3 temporary tablespace temp 4 quota unlimited on users;User created.SQL> grant createsession, resource, alter session to test;Grant succeeded.SQL> conntest/test;Connected.SQL> create tableemp(id number, name varcha 阅读全文