c++ - What is the most efficient way to read two tables from a database? -

I am facing a small C ++ project and I was thinking that most of the data reading from 2 tables What's the best way I can not change it using SQLite

The tool in the first table (150k - 300k entries) There are many features in each device (5-40 features).

What is the best way to read this? Everything is local.

I was thinking:

• Sequence (read each device one by one and its features for each.

/ P> / ul>

Basically you will first or deeply approach first?

I am not a DB expert, so whatever can help!

thanks