摘要
随着计算机应用的深入,应用数据也随着日常工作而迅速增长,作为数据仓库的数据库的重要性也日益显著。在数据库的各种操作中,数据库查询所占的比重最大,也是用户经常使用的功能之一。笔者首先介绍了数据库查询原理,然后介绍了数据库的通用查询语言工具,同时通过具有代表性的实验讲解了数据库查询性能的优化。并就数据库查询性能进行介绍和探索。
with the development of computer applications,application data with the daily work and rapid growth,as the data warehouse database is becoming increasingly significant.in a variety of database operation,a database query that accounted for the largest proportion,but also users often use one of the functions of.This paper first introduces the principles of database query,and then introduced the database query language,at the same time through typical experiments explained the database query optimization.the database query performance for introduction and exploration.
出处
《装备制造技术》
2012年第3期43-45,共3页
Equipment Manufacturing Technology
