The system already Sybase SQL installed. And under it's interactive SQL, I have used "SELECT * FROM allevents" to sucessfully queried the table.
However, when I used autoit, it returns compiling error: "no such table: allevents"
$hDB = _SQLite_Open ("C:\Database.db" = ":memory:")
_SQLite_Exec ($hDB, "SELECT * FROM allevents")