: The maximum relational database size for the Express family has been bumped to 50 GB (up from 10 GB in previous versions).
setup.exe /Q /ACTION=Install /FEATURES=LocalDB /IACCEPTSQLSERVERLICENSETERMS sql server 2025 localdb
But, to his surprise, he noticed that one of his databases was missing. The database, called "CustomerData," had been created a few days ago, and he was certain that he had made a backup of it. : The maximum relational database size for the
As he dug deeper, he discovered that a new feature in SQL Server 2025 LocalDB, called "Enhanced Security," had been enabled by default. This feature introduced additional security checks, including token-based server access validation. As he dug deeper, he discovered that a
string connectionString = @"Server=(localdb)\MSSQLLocalDB;Database=MyAppDb;Trusted_Connection=true;";
sqllocaldb start MSSQLLocalDB # Error: LocalDB instance start failed # Check if corrupted: sqllocaldb delete MSSQLLocalDB && sqllocaldb create
LocalDB is a lightweight, version of SQL Server Database Engine. It is designed for developers who need a real SQL Server database for local development, unit testing, or desktop applications—without the overhead of a full SQL Server service or instance management.