We have a data collection system that collects measurements from environmental sensors that measure velocity of water flowing through a river or channel. Each measurement generates a fixed number of values (e.g. Date, Time, Temperature, Pressure etc.) plus a list of velocity values.We have a data collection system that collects
阅读背景：
在数据库中使用可变数量的字段存储测量的最有效方法是什么？
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