我尝试使用python3（3.5.3）库pymssql（2.1.3）连接到sql server 2012 db并发生此错误：
conn = pymssql.connect(host="192.168.xxx.xxx", user="wbs", password="123@123", database="mydb")
Traceback (most recent call last):
File "pymssql.pyx", line 635, in pymssql.connect (pymssql.c:10734)
File "_mssql.pyx", line 1902, in _mssql.connect (_mssql.c:21821)
File "_mssql.pyx", line 637, in _mssql.MSSQLConnection.__init__ (_mssql.c:6581)
File "_mssql.pyx", line 1630, in _mssql.maybe_raise_MSSQLDatabaseException (_mssql.c:17524)
_mssql.MSSQLDatabaseException: (4075, b'DB-Lib error message 20018, severity 16:\nGeneral SQL Server error: Check messages from the SQL Server\nDB-Lib error message 20018, severity 14:\nGeneral SQL Server error: Check messages from the SQL Server\nDB-Lib error message 20002, severity 9:\nAdaptive Server connection failed (192.168.100.249:1433)\n')
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "pymssql.pyx", line 641, in pymssql.connect (pymssql.c:10824)
pymssql.OperationalError: (4075, b'DB-Lib error message 20018, severity 16:\nGeneral SQL Server error: Check messages from the SQL Server\nDB-Lib error message 20018, severity 14:\nGeneral SQL Server error: Check messages from the SQL Server\nDB-Lib error message 20002, severity 9:\nAdaptive Server connection failed (192.168.100.249:1433)\n')
并且在mssql错误中有一个日志：
The USE database statement failed because the database collation %.*ls is not recognized by older client drivers. Try upgrading the client operating system or applying a service update to the database client software, or use a different collation. See SQL
答案 0 :(得分：1)
默认情况下，pip从静态链接到FreeTDS 0.95的二进制轮（.whl）文件安装pymssql 2.1.3。不幸的是，旧版本的FreeTDS不知道如何使用一些不太常用的SQL Server排序规则。例如，已知Persian_100_CI_AI会导致类似于您在FreeTDS 0.9x（ref：here）下描述的错误。
FreeTDS 1.x对这些排序规则有更好的支持，因此可以选择安装FreeTDS的最新稳定版本（目前为1.00.51），然后从GitHub的最新源构建pymssql。
或者，您可以尝试将pyodbc与当前版本的Microsoft SQL Server ODBC驱动程序一起使用。