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SqlConnection con = new SqlConnection Source=np:\\.SQL Server Management Studio is an integrated graphical interface that is used to configure, manage, monitor and administrate the SQL Server instances hosted on the local machine, on a remote server or in the cloud. The following is a perfectly valid connection string & connects to the specified local DB instance: You can also use this named pipe path in the connection string from code. Remember that the part of the named pipe path after # will change with every instance start and hence it cannot be hardcoded in the code. Instead they should use the raw named pipe path of the LocalDB instance (this can be retrieved using sqllocaldb utility): Current (pre-SQL Server 2012) versions of SQL Server Management Studio cannot connect to LocalDB instances using server name prefix "(localdb)".Unlike other SQL Server editions, LocalDB does not require multiple installations for multiple database engine instances. Multiple users on a computer can create and start database instances simultaneously using the same installed LocalDB bits.There may be a delay when a local DB instance is created or started for the first time, causing the parent application to timeout.This means that when LocalDB is used from an application running as a non-interactive user account (including IIS), that user account should be configured to load user profiles, Otherwise, the instance starting process will fail.
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LocalDB stores system database files in user’s AppData folder (see below).LocalDB instances are named, user specific and private (except the auto instance).It supports, creating, starting, stopping & deleting LocalDB instances (you cannot delete an automatic instance). sqllocaldb.exe is the simple command line admin companion for LocalDB.LocalDB instances do not use Win32 services the engine is loaded on demand by the parent process.All the database size limitations of Express apply to LocalDB as well.LocalDB is intended to be for developers without the overhead of regular SQL Server installations. SQL Express edition is upgradable to higher SKUs, but LocalDB is not.
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#SQL SERVER MANAGEMENT STUDIO 17 LOCALDB CODE#
Output from a SQL Server 2012 RC0 instance for the above code is shown below: SqlConnection con = new SqlConnection Source=(localdb)\v11.0 Integrated Security=true Initial Catalog=master") Īs with user instances, AttachDbFileName keyword is also supported to connect to a database directly. In order to connect to a LocalDB instance, the Data Source keyword of the connection string should start with (localdb) followed by the instance name. Any number of private instances can be spun off from single installed LocalDB bits.įrom a programming perspective, the API surface remains the same, be it managed or native. Hence, the automatic LocalDB instance is identified as (localdb)\v11.0. Technically, this automatic instance is also a named instance with a special name that reflects the engine version for SQL Server 2012, it is v11.0. Any application can connect to it and perform database operations. LocalDB also has an automatic instance which is created & started automatically and public. MSDN says user instance feature of Express editions is deprecated and developers should switch to LocalDB going forward. Once started, other applications cannot connect to it unless the instance is explicitly shared by its owner. The name of the instance can be anything given at the time of creation. The engine runs as long as the parent process runs but as a private named instance. Strictly speaking, LocalDB is not a new SQL Server edition by itself rather, it is a database engine activation mode in which the SQL Server process (sqlservr.exe) runs as a child of the calling process but without exposing any connectivity surface. LocalDB is a lightweight version of SQL Express with zero administration and low installation foot-print. "Denali"), the available Microsoft SQL database options available now are: With the introduction of SQL Express LocalDB (part of SQL Server 2012 a.k.a.