Example for SQL 2019 Express: LocalDB_x64_ENU.msi (~40-50 MB) Silent Installation (recommended for automation): msiexec /i LocalDB_x64_ENU.msi /quiet /norestart IACCEPTSQLLOCALDBLICENSETERMS=YES With progress UI (interactive): msiexec /i LocalDB_x64_ENU.msi Uninstall: msiexec /x LocalDB_x64_ENU.msi /quiet 4. Post-Installation – Managing LocalDB After MSI install, use SqlLocalDB.exe (in %ProgramFiles%\Microsoft SQL Server\<version>\Tools\Binn\ ). Common Commands: | Command | Description | |---------|-------------| | SqlLocalDB info | List all instances | | SqlLocalDB create "MyInstance" | Create new instance | | SqlLocalDB start "MyInstance" | Start instance (returns pipe name) | | SqlLocalDB info "MyInstance" | Show details (port, owner, status) | | SqlLocalDB stop "MyInstance" | Stop instance | | SqlLocalDB delete "MyInstance" | Delete instance | Example – Use in .NET connection string: Server=(localdb)\MyInstance;Integrated Security=true;Database=MyDb; Or auto-attach: