Python 获取 Access 表字

发布时间:2019-10-09 10:39:11编辑:auto阅读(2182)

    时效说明:walker 的旧文迁移,某些地方可能过时,最后更新时间为 2015-09-25

    以下所有代码 Python2.7、Python3.4 均可用。

    win32.com

    # encoding: utf-8
    # author: walker
    # date: 2015-09-25
    # summary: 打印指定access文件、指定表的所有字段
    
    import win32com.client
    
    def PrintColumns_win32com(pathfile, tablename):
        conn = win32com.client.Dispatch(r'ADODB.Connection')
        DSN = 'PROVIDER=Microsoft.ACE.OLEDB.12.0;DATA SOURCE=' + pathfile + ';'
        #DSN = 'PROVIDER=Microsoft.Jet.OLEDB.4.0;DATA SOURCE=' + pathfile + ';'
        conn.Open(DSN)
          
        rs = win32com.client.Dispatch(r'ADODB.Recordset')
        rs.Cursorlocation = 3
        sql = 'SELECT TOP 1 * FROM ' + tablename
        print(sql)
        rs.Open(sql, conn)
        for i in range(0, rs.Fields.Count):
            print('%s - %d - %d' % (rs.Fields[i].Name, rs.Fields[i].Type, rs.Fields[i].DefinedSize))
          
        conn.Close()

    关于字段类型(Type):3为数字,202为文本,203为备忘。Windows 下有更简洁的函数 pypyodbc.win_connect_mdb,只需要填路径。

    相关阅读

    pyodbc

    # encoding: utf-8
    # author: walker
    # date: 2015-09-25
    # summary: 打印指定access文件、指定表的所有字段
    
    import pyodbc
    
    def PrintColumns_pyodbc(pathfile, tablename):
        connStr = r'Driver={Microsoft Access Driver (*.mdb, *.accdb)};Dbq=%s;' % pathfile
        print('connStr:' + connStr)
        conn = pyodbc.connect(connStr)
        
        cur = conn.cursor()
        
        for row in cur.columns(table=tablename):
            print(row.column_name)
        
        cur.close()
        conn.close()

    相关链接

    pypyodbc

    # encoding: utf-8
    # author: walker
    # date: 2015-09-25
    # summary: 打印指定access文件、指定表的所有字段
    
    import pypyodbc
    
    def PrintColumns_pypyodbc(pathfile, tablename):
        connStr = r'Driver={Microsoft Access Driver (*.mdb, *.accdb)};Dbq=%s;' % pathfile
        print('connStr:' + connStr)
        pypyodbc.lowercase = False  #是否将字段名转为小写
        conn = pypyodbc.connect(connStr)
         
        cur = conn.cursor()
        cur.execute('SELECT TOP 1 * FROM ' + tablename)
        
        cnt = 0
        for tup in cur.description:
            print(tup[0])
            cnt += 1
        print('cnt:' + str(cnt))
         
        cur.close()
        conn.close()

    相关链接

    pyodbc 与 pypyodbc 取值的区别

    • 在 select 指定字段时
    row[idx] row.field row['field'] row.get('field')
    pyodbc × ×
    pypyodbc ×
    • 在 select * 时
    row[idx] row.field row['field'] row.get('field')
    pyodbc × × ×
    pypyodbc ×

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