使用pyodbc连接到Sql Server时出错

Question

I'm trying to fetch data from SQL database with pyodbc with the code given below.The connection works rarely, most of the time it gives the error,

OperationalError: ('HYT00', '[HYT00] [Microsoft][ODBC SQL Server Driver]Login timeout expired (0) (SQLDriverConnect)')

import numpy as np
import pyodbc as odbc

conn_string = ('DRIVER={SQL Server};SERVER=test;DATABASE=DEV;UID=me;PWD=whatever;')
cnxn = odbc.connect(conn_string)
cursor = cnxn.cursor()
cursor.execute("Select * from PurchaseOrders")
rows = cursor.fetchall()
ID = [i[1] for i in rows]
ID_array = np.fromiter(ID, dtype= np.int32)

I have tried setting the timeout to zero and DRIVER={ODBC Driver 11 for SQL Server} as I'm using SQL Server 2014. None of these works.

Answer 1

There was a problem with DNS. I used the IP address of the server instead, works fine now.