使用 Python 将数据从 MSSQL 数据库复制到 Postgresql 数据库

我有两个 2 数据库.一个使用 MSSQL，另一个使用 Postgresql.我希望我的 python 脚本每天都在运行(为此，我在 linux 上使用了 cron-job).MSSQL 数据库中的数据应复制到 Postgresql 数据库.我有一个想法，但它行不通.你可以帮帮我吗???也许我的解决方案是完全错误的...

I have two 2 databases. One with MSSQL and another with Postgresql. I want that my python script is running (for this I use a cron-job on linux), every day. The data from the MSSQL database should copied to the Postgresql database. I have an idea but it doesn't works. Could you help me??? Maybe my solution is totally wrong...

这是我的代码:

import pymssql, psycopg2

class DatabaseRequest:

    def __init__(self):
        self.conn1 = pymssql.connect(host='****', user='****', password='****', database='****')
        self.conn2 = psycopg2.connect("dbname='****' user='****' host='*****' password='****'")

        self.cur1 = self.conn1.cursor()
        self.cur2 = self.conn2.cursor()

    def request_proc(self, rows):
        self.cur1.execute("SELECT top 10  tag, site, plant, unit, line, ProcessID AS pid, Count(ReadTime) AS mods \
                        FROM ( \
                        select dateadd(dd, -1, convert(varchar, getDate(),111)) \
                        as tag, ReadTime, processID, subid, PR.Site, PR.Plant, PR.Unit, PR.Line \
                        from FactBarcodeReading BCR with(nolock) \
                        inner join DimProcess PR on BCR.ProcessKey = PR.ProcessKey \
                        where PR.ProcessID IN  (802, 1190, 1800, 3090, 3590, 4390, 4590, 4800, 5000, 5400, 4190) \
                        and ReadTime between dateadd(dd, -1, convert(varchar, getDate(),111)) and dateadd(dd, -0, convert(varchar, getDate(),111)) \
                        ) a \
                        GROUP BY tag, site, plant, unit, line, ProcessID \
                        ORDER BY site, plant, unit, line, ProcessID")

        rows = self.cur1.fetchone()

       # return rows   


    def insert_proc(self):
        self.cur2.execute("INSERT INTO 20091229global (proddate, site, plant, unit, line, pid, mods) \
                        VALUES ('%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s')"
                        % self.cur1.fetchone())


        a = DatabaseRequest()
        print a.insert_proc()

PS:request_proc 工作正常.

PS: the request_proc works fine.