python3.6如何安装pymssql

使用pip install pymssql安装时，总是会出现UnicodeDecodeError。于是下载了适用的pymssql.whl进行安装，详细可参考

https://docs.microsoft.com/en-us/sql/connect/python/pymssql/step-1-configure-development-environment-for-pymssql-python-development