SQL Server Native Client 11.0 OLE DB Provider connection strings

Connects to

SQL Server 2012

  • Standard security

    Provider=SQLNCLI11;Server=myServerAddress;Database=myDataBase;Uid=myUsername;
    Pwd
    =myPassword;

    Are you using SQL Server 2012 Express? Don't miss the server name syntax Servername\SQLEXPRESS where you substitute Servername with the name of the computer where the SQL Server 2012 Express installation resides.

    When to use SQL Native Client?

  • Trusted connection

    Provider=SQLNCLI11;Server=myServerAddress;Database=myDataBase;
    Trusted_Connection
    =yes;

    Equivalent key-value pair: "Integrated Security=SSPI" equals "Trusted_Connection=yes"

  • Connecting to an SQL Server instance

    The syntax of specifying the server instance in the value of the server key is the same for all connection strings for SQL Server.

    Provider=SQLNCLI11;Server=myServerName\theInstanceName;Database=myDataBase;
    Trusted_Connection
    =yes;
  • Prompt for username and password

    This one is a bit tricky. First you need to set the connection object's Prompt property to adPromptAlways. Then use the connection string to connect to the database.

    oConn.Properties("Prompt") = adPromptAlways

    oConn.Open "Provider=SQLNCLI11;Server=myServerAddress;DataBase=myDataBase;"
  • Enable MARS

    Provider=SQLNCLI11;Server=myServerAddress;Database=myDataBase;
    Trusted_Connection
    =yes;MARS Connection=True;
  • Encrypt data sent over network

    Provider=SQLNCLI11;Server=myServerAddress;Database=myDataBase;
    Trusted_Connection
    =yes;Encrypt=yes;
  • Attach a database file on connect to a local SQL Server Express instance

    Provider=SQLNCLI11;Server=.\SQLExpress;AttachDbFilename=c:\asd\qwe\mydbfile.mdf;
    Database
    =dbname;Trusted_Connection=Yes;

    Why is the Database parameter needed? If the named database have already been attached, SQL Server does not reattach it. It uses the attached database as the default for the connection.

  • Attach a database file, located in the data directory, on connect to a local SQL Server Express instance

    Provider=SQLNCLI11;Server=.\SQLExpress;
    AttachDbFilename
    =|DataDirectory|mydbfile.mdf;Database=dbname;
    Trusted_Connection
    =Yes;

    Why is the Database parameter needed? If the named database have already been attached, SQL Server does not reattach it. It uses the attached database as the default for the connection.

  • Database mirroring

    If you connect with ADO.NET or the SQL Native Client to a database that is being mirrored, your application can take advantage of the drivers ability to automatically redirect connections when a database mirroring failover occurs. You must specify the initial principal server and database in the connection string and the failover partner server.

    Provider=SQLNCLI11;Data Source=myServerAddress;
    Failover Partner
    =myMirrorServerAddress;Initial Catalog=myDataBase;
    Integrated Security
    =True;

    There is ofcourse many other ways to write the connection string using database mirroring, this is just one example pointing out the failover functionality. You can combine this with the other connection strings options available.

Problems connecting?
Get answer in the SQL Server 2012 Q & A forum

SQL Azure

  • Standard

    Microsoft does not announce support for OLE DB connections to Azure and there are limitations. Some required OLE DB schema rowsets are not available from an Azure connection, and some properties that identify features in SQL Server are not adjusted to represent SQL Azure limitations. For most common connect/query/update tasks it seems to work fine.

    Provider=SQLNCLI11;Password=myPassword;User ID=[username]@[servername];
    Initial Catalog
    =databasename;Data Source=tcp:[servername].database.windows.net;
OLE DB ProviderProvider=SQLNCLI11Info and provider downloads

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