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。
Desgned and implemented the data management of the patients 'cases, speech exercise results, exercise courses and exercise materials, including inputting, query, modification and printing etc.
设计与实现了患者病历数据、训练资料数据、言语训练课程数据、言语训练结果统计数据等的输入、查询、修改及统计打印等管理功能。
The system manages the engineering data by using the engineering database, which have the fundamental functions of real-time storage, real-time query, realtime modification.
本系统采用工程数据库管理数据，具有实时存储、实时查询、实时修改的功能。
The system manages the engineering data by using the engineering database, which have the fundamental functions of real-time storage, real-time query, realtime modification.
本系统采用工程数据库管理数据，具有实时存储、实时查询、实时修改的功能。
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