由于跟踪客户的购物意向，以及一切客户的购物动向，以及各户的资料-As a result of the intention to keep track of customers, as well as all customer shopping trends, as well as information on households

根据3点计算趋势。原理：根据斜率判断趋势. 输出：1为下降，2为平行，3为上升.-Calculate the trends in under 3:00. Principle: According to the slope to judge the trend. Output: 1 down, 2 parallel, three for the rise.

关于如何从数据库中调用数据通过趋势图来实现-Trends on how to call data from the database