09 2020 档案
摘要：import pandas as pd import numpy as np from sklearn import datasets import matplotlib.pyplot as plt from sklearn.linear_model import LinearRegression
阅读全文
摘要：# select用法 select a.*, b* from a inner join b on a.id = b.id; # update用法 update a set name = b.name from b where a.id = b.id;
阅读全文
