from __future__ import division
from numpy.random import randn
import numpy as np
import os
import matplotlib.pyplot as plt
from io import StringIO# StringIO模块主要用于在内存缓冲区中读写数据。模块是用类编写的,只有一个StringIO类,
# 所…
1.pivot用法
pandas中,pivot源码中是这样解释的
Return reshaped DataFrame organized by given index / column values.Reshape data (produce a "pivot" table) based on column values. Usesunique values from specified index / columns to form a…
用PIVOT实现行转列
举个简单栗子:
SELECT TOP 50 [学生类别], [学校所在年级], count([学生id]) 总人数
FROM [OTO_学生报名表]
where [学校所在年级] LIKE %年级%
group by [学生类别],[学校所在年级]
order by [学生类别],[学校所在年级]
查询结果为…
今天帮人做一个交叉表,发现一个奇怪的问题create view view_PivotTable
as
select t1.fnumber"物料代码",t1.fname"物料名称",t2.fname"仓库名称",t3.fqty"数量" from t_icitem t1 inner join icinventory t3 on t1.fitemi…