电力信息决策系统中查询和数据跟踪的设计技巧

决策系统中数据查询的速度至关重要，特别是随着数据量的增加，查询性能会有较大的下降，因此在设计中必须采取适当的方法，解决查询性能和数据量增长的矛盾，达到系统设计的目标，数据安全是数据库安全运行的保障，所以在系统设计中必须考虑，采用数据跟踪能保障数据安全、防止数据丢失和工作人员的恶意破坏，同时具有简单、实用、方便、可恢复性强的特点。

The Design Skill of Select and Data Track in Electric Power Decision Support System

The select speed of data is important in DSS (decision support system) , especially with the increase of data amount and the obvious descending of select speed. In order to resolve the contradiction between capability of select and the increase of data and fulfil the aim of system design, the proper way of design must be adopted. Data safe is the guarantee of database that runs steadily, so it must be considered in the system design and adopt the way of data track so that it can prevent the data from losing and hold back the spiteful damage by staff. Simultaneously, the way of data track not only has simply practical and convenient characteristic, but also has strong resilience.