| Feature | LocalDB 2019 | SQL Server Express | SQLite | |--------|--------------|--------------------|--------| | | ~50-100 MB | ~1-2 GB | ~1 MB | | Process mode | User (on-demand) | Windows service | In-process | | Network support | No (local only) | Yes | No | | T-SQL support | Full Express engine | Full Express engine | Limited | | Use case | Dev/unit testing | Small production | Embedded apps |
conn.Open(); // Your SQL commands