参考代码1:根据a.日期,和b表日期比较,遍历(逐条数据查找b.日期)只要是小于等于a.日期的收入数据,就累加求和。 select a.日期, ( select sum(b.卖茶叶蛋收入) as 累加 from [she…
标签:sheet
Pandas库read_excel()参数详解
pandas.read_excel(io,sheet_name = 0,header = 0,names = None,index_col = None,usecols = None,squeeze = False,dt…
MongoDB数据导入导出
导入数据 from pymongo import MongoClient host = 'localhost' port = 27017 #连接MongoDB client =MongoClient(host,port)…