win10 下 python 连接 sqlserver 数据!!(不是用pymssql)!!

 话不多说 nice!!

# -*- coding:utf-8 -*-
import time
import pyodbc
import threading
import queue

'''
链接数据库的库有 pymssql pyodb ctds Turboodbc
pyodb ---- VVVV
{SQL Server} - released with SQL Server 2000
{SQL Native Client} - released with SQL Server 2005 (also known as version 9.0)
{SQL Server Native Client 10.0} - released with SQL Server 2008
{SQL Server Native Client 11.0} - released with SQL Server 2012
{ODBC Driver 11 for SQL Server} - supports SQL Server 2005 through 2014
{ODBC Driver 13 for SQL Server} - supports SQL Server 2005 through 2016
{ODBC Driver 13.1 for SQL Server} - supports SQL Server 2008 through 2016
{ODBC Driver 17 for SQL Server} - supports SQL Server 2008 through 2017

运行“ odbcad32.exe”进入此“ ODBC管理器”窗口 查看驱动
'''

class Write_SQL():
    def __init__(self):
        starttime = time.time()
        self.q = queue.Queue()
        super().__init__()

    def Connection_sql(self,sqlservernum,localip,database,user,password):
        '''数据库版本 int,localip 本地ip 连接的数据库 用户名 密码'''
        if 5 <= int(sqlservernum) <= 14:
            # driver = '{SQL Server Native Client 11.0}'
            driver = '{ODBC Driver 11 for SQL Server}'
        elif 14 < int(sqlservernum) <= 16:
            driver = '{ODBC Driver 13 for SQL Server}'

        print(driver,localip,database,user,password)
        # autocommit=True 自动提交
        # 自动更新数据库连接
        sql = threading.Thread(target=self.update_sql,args=(driver,localip,database,user,password))
        # 守护进程 主进程结束 子进程也结束 防止陷入僵尸进程
        sql.setDaemon(True)
        sql.start()
        self.conn = self.q.get()


    # 动态更新数据库连接 一个小时更新一次
    def update_sql(self,driver,localip,database,user,password):
        while True:
            try:
                self.conn = pyodbc.connect('DRIVER={};SERVER={};DATABASE={};UID={};PWD={}'.format(driver,localip,database,user,password))
            except Exception as EX:
                time.sleep(5)
                print(repr(EX))
            else:
                self.q.put(self.conn)
                time.sleep(60*60)
                self.conn.close()

    def Execute_statement(self,sqlcode):
        try:
            self.cursor = self.conn.cursor()
            self.cursor.execute(sqlcode)
        except pyodbc.IntegrityError as PITE:
            raise pyodbc.IntegrityError('数据写入库时 --->>> 主键出现重复 sql == > "{}"'.format(sqlcode))
        except pyodbc.ProgrammingError as PPME:
            raise pyodbc.ProgrammingError('语法错误:sql == > "{}"'.format(sqlcode))
        else:
            self.conn.commit()

    def Read_data(self,sqlcode):
        try:
            self.cursor = self.conn.cursor()
            self.cursor.execute(sqlcode)
        except Exception as EX:
            print(repr(EX))
        else:
            return self.cursor.fetchall()

    def __del__(self):
        sys.exit(0)
        os._exit()

if __name__ == '__main__':
    WS = Write_SQL()
    WS.Connection_sql(14,'192.168.1.5','GJC_Key','sa','zxc1230.')
    sql = "select top 100000 Keywords from ConnectKeywords_ali where Keywords like '{}%' order by UpdateTime;".format('a')
    datalist = WS.Read_data(sql)
    print(datalist,'----')