为了适应工程中多通道振动数据的快速存储和准确查询。
In order to adapt to the engineering of the multi-channel vibration data storage and accurate in - quires.
同时，还具有对指定通道指定类型数据的准确查询、导出以及打印功能等。
At the same time, also has the channel to designated type data ac - curate inquiry, export and print function, etc.
准确的索引信息和统计信息是查询优化器中基于成本的决策的基础。
Accurate index information and statistics are fundamental to cost-based decisions in the query optimizer.
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