也就是说,这里是对数据的一种运用:0 16 AutomotiveI own a car/cars I own a car/cars
1 16 Automotive Access to car Single Do you have access toI lease/ have a company car I lease/have a compa
我对标准偏差函数(特别是stddev_samp在MonetDB中)有一些问题。我尝试了以下查询,但没有成功: select stddev_samp(marketcap) as industrysd from cumulativeview group by industry
每个函数都给出了一个非常奇怪的异常,而且stddev函数似乎不