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:
| Database Error | |
|---|---|
| Message: | MySQL Error has occured |
| MySQL Error: | Column 'userid' cannot be null |
| Date: | Sunday, December 14, 2025 at 9:09:11 AM |
| Query: | REPLACE INTO ar_session VALUES ('f1ea822eae890d84f4f4cfb2f3113a29', NULL, 'userid|i:0;securitytoken|s:32:\"e16496410ea83bb9d9b295b935ace0be\";', INET6_ATON('185.104.194.44'), '', NOW(), '/apk/soundabout-apk-download-oey6v', 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36', 0, 0, 0, 0, 0, '', 0) |
| Trace: | at line /home/appr/public_html/lib/session.class.php at line 198 /home/appr/public_html/lib/mysqli.class.2.php at line 482 |