一直连接不上，找了好多博客，最后发现是端口号的字符串有问题
[08001] [Microsoft][ODBC Driver 17 for SQL Server]SQL Server Network Interfaces: Connection string is not valid [87]. (87)
[HYT00] [Microsoft][ODBC Driver 17 for SQL Server]Login timeout expired (0)
[08001] [Microsoft][ODBC Driver 17 for SQL Server]A network-related or instance-specific error has occurred while establishing a connection to SQL Server. Server is not found or not accessible. Check if instance name is correct and if SQL Server is configured to allow remote connections. For more information see SQL Server Books Online. (87)
这个主机开始我写的是这样的：
127.0.0.1：1431
后来发现不对，总是报字符串有问题，
127.0.0.1,1431
冒号改成逗号就ok了，
这个折腾了一中午，mark 一下，太久不用sql server 了
