. 《中文名》: 查询设计连接 《英文名》: Query Design Join --------------------- 联接属性(&J) 删除(&D) 《中文名》:Query DesignGrid 《英文名》:Query Desig
基于16个网页-相关网页
例如,数据库连接组件可能不会选择在设计时查询数据库。
For example, a database connection component may choose not to query the database at design time.
系统包括上位机软件、RS232—485转换器、分机模块及电缆连接4部分,其监控程序的设计采用顺序查询的方式执行主程序。
The system consists of upper computer software, RS232-485 converter, every kind of modules and cables. And finally the monitor program is designed with the sequential query mode.
非规范化设计减少了查询操作所需的连接,减少了外部键和索引的数量,可以预先进行统计计算,提高了查询时的响应速度;
While abnormalization design reduces joins which query requires and the number of keys and indices, can count in advance and improve the query speed.
应用推荐