pyodbc：Python使用pyodbc访问数据库操作方法

之前介绍过很多种python访问数据库的方法，例如create_engine。。还有pyssl等等。。

此外，还有一种pyodbc的方法。

Python使用pyodbc访问数据库操作方法详解：https://www.jb51.net/article/143212.htm

无法预定义语句

这个错误实际上在之前有遇到过。。当时是怎么解决的呢。。好像是把数据类型修改了一下：https://www.cnblogs.com/2008nmj/p/15047692.html

sqlalchemy.exc.ProgrammingError: (pyodbc.ProgrammingError) ('42S22', "[42S22] [Microsoft][SQL Server Native Client 11.0][SQL Server]列名 'contact_name' 无效。 (207) (SQLExecDirectW); [42S22] [Microsoft][SQL Server Native Client 11.0][SQL Server]无法预定义语句。 (8180)") [SQL: 'SELECT TOP 1 users.id AS users_id, users.username AS users_username, users.password_hash AS users_password_hash, users.contact_name AS users_contact_name, users.email AS users_email, users.phone AS users_phone, users.disabled AS users_disabled, users.realname AS users_realname, users.groupid AS users_groupid, users.roleids AS users_roleids, users.company_id AS users_company_id, users.valid_time AS users_valid_time, users.level AS users_level, users.create_time AS users_create_time, users.update_time AS users_update_time FROM users WHERE users.username = ?'] [parameters: ('gaochun',)] (Background on this error at: http://sqlalche.me/e/f405)

>>怎么生成md5码：怎么加密

import hashlib


def get_hash(s):
    if s is not '':
        return hashlib.md5(s.encode(encoding='UTF-8')).hexdigest()
    else:
        return s


def verify(value, hashvalue):
    h = hashlib.md5(value.encode(encoding='UTF-8')).hexdigest()
    if h == hashvalue:
        return True
    else:
        return False

if __name__ == '__main__':
    s1 = '123';
    s2 = get_hash(s1);
    print(s2);

参考：https://www.cnblogs.com/2008nmj/p/13856121.html

dbo.users

如果把mssql+pymssql://sa:xxx@localhost:1433/sss换成myssql+pyodbc://sa:xxx@.....

找到原因了。。默认数据库没有配置。。