无法从R连接到Azure虚拟机数据库

Question

I am trying to connect to a Microsoft SQL Server database running on a virtual machine in Microsoft Azure, from R.

Here is what my SQL server looks like

This is my connection string

library(RODBC)
channel = odbcConnect(dsn="something.cloudapp.net",uid="myusername",pwd="mypassword");

However, I keep getting this error

Warning messages:
1: In odbcDriverConnect("DSN=servername.cloudapp.net,1433;UID=myusername;PWD=mypassword") :
  [RODBC] ERROR: state IM002, code 0, message [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified
2: In odbcDriverConnect("DSN=servername.cloudapp.net,1433;UID=myusername;PWD=mypassword"):
  ODBC connection failed

Why do I keep getting this error?

Answer 1

Try using the more flexible odbcDriverConnect function like this:

odbcDriverConnect('driver={SQL Server};Server=myServerAddress;Database=myDataBase;User Id=myUsername;Password=myPassword;')

Here it is with carriage returns for readability:

odbcDriverConnect(
    'driver={SQL Server};
     Server=myServerAddress;
     Database=myDataBase;
     User Id=myUsername;
     Password=myPassword;')

See also:

• SQL Server RODBC Connection
• http://www.connectionstrings.com/sql-server/
• http://www.inside-r.org/packages/cran/rodbc/docs/odbcConnect