题目: From a 1000 Hz clock, derive a 1 Hz signal, called OneHertz, that could be used to drive an Enable signal for a set of hour/minute/second counters to create a digital wall clock. Since we want the clock to count once per second, the OneHer…
一、数仓以及商业智能(Data Warehousing and Business Intelligence, DW/BI)系统
1.1数据操作和数据获取的区别
对所有组织来说,信息都是其最重要的财富之一。信息几乎总是用作两个目的:操作型记录的保存和分析型决策的制定。简单来说&…