Preload Sqlite db on my app

Hi everyone, I have a preloaded database in SQLite that I want to read data on my app.
How can I read data from that database and where should I put the database.db file on my files.

I’ve tried putting the db on Assets but not working.

Everything works fine if i create , insert and read data in the same code , but it’s like another database not my preloaded database.

Thanks for the help in advance.