理学 数据库系统 释 query optimization 查询优化 查询优化旨在通过选择有效策略，对给定的关系表达式求值，使得查询代价最小。
数据库 数据库管理系统及其实现技术 释文 query optimization 查询优化
- Zhao Pu
- Zhao Puchu
- Zhao Qiguo
- Zhao Qing
- Zhao Qingge
- Zhao Qinghai
- Zhaoqing Museum(Memorial Hall of the former site of yeting independent League Headquarters )
- Zhao Qixia
- Zhaoquanhe Zhen
- Zhao Que
- Zhao Renkai
- Zhao Rongchen
- Zhao Ruheng
- Zhao Ruihong
- Zhao Rulan
- Zhao Rushi
- Zhao Rusui
- Zhao Rutan
- Zhao Ruteng
- Zhao Ruyu
- Zhao Shanhuan
- Zhao Shankuo
- Zhao Shanlin
- Zhao Shanqing
- Zhao Shaoang