pandas - 从一些 odbc 连接到没有 csv 的 pandas 表的 itter

Question

我在 pandas DataFrame 中有一些基本信息。我需要将它与我可以通过 pyodbc 连接访问的一些参考表连接起来。有没有办法将 sql 结果集放入 pandas DataFrame 而无需先将结果集写入 csv？

将这个额外的步骤转移到 csv 并进入 DataFrame 似乎是一种浪费。

Answer 1

I've gotten pyodbc to work with my SQL Server instance, then, with some help from this thread, I got the sql return to load a dataframe.

I already setup a pyodbc connection, then made a call to it.

import pyodbc

import pandas.io.sql as psql

cnxn = pyodbc.connect(your_connection_info) 
cursor = cnxn.cursor()
sql = ("""SELECT * FROM Source""")

df = psql.frame_query(sql, cnxn)
cnxn.close()

df should return your dataframe now. The hardest part for me was getting pyodbc up and running - I had to use freetds and it took a lot of trial and error to get it work.