Localdb _hot_ <2027>

: Despite its size, it supports the same Transact-SQL language, stored procedures, and data types as the full SQL Server Express edition. How to Install and Manage LocalDB

"ConnectionStrings": "DefaultConnection": "Server=(localdb)\\MSSQLLocalDB;Database=MyDb;Trusted_Connection=True;" localdb

: LocalDB instances start automatically when an application connects and shut down when the last connection is closed. : Despite its size, it supports the same

To connect from an application or SQL Server Management Studio (SSMS) , use a specific connection string format. : (localdb)\MSSQLLocalDB Named Instance : (localdb)\YourInstanceName SQL Server Express LocalDB - Microsoft Learn : Despite its size

: Use sqllocaldb start [InstanceName] (e.g., MSSQLLocalDB ).