You will have to determine whether the gains in query performance outweigh the affect to performance during data modification and in additional disk space requirements.
您应该确定修改数据时在查询性能上的提升是否超过了对性能的影响，以及是否需要额外的磁盘空间要求。
Many functions have been realized in our database, for example, multi-aspect query, loading, modification, deletion, extraction of data, printing, backup and help.
数据库实现了多种操作功能：有多途径检索、录入、修改、删除、数据提取、打印、数据备份、帮助。
It can realize not only the data manipulating functions such as browsing, query, copy, output, adding, deletion, modification and renewing, but also spatiotemporal analysis.
系统具备了对数据的浏览、查询、复制、输出以及增加、删减、修改、更新等功能，还能对数据进行时空分析。
应用推荐