I'm creating SQLite tables from code and could use help with the following
issues:

1. I'd like some tables to include foreign keys. These should be indexed for
speed, but they are neither primary keys or unique. But I don't see any
option to index a column without it being one of those two?

2. In my first attempt at this, I used INT data types for columns. It seemed
to be working but when I added AUTOINCREMENT, I get an error that this is
only valid with INTEGER types. When I changed INT to INTEGER, it works fine.
So what the heck type was used when I specified INT?

3. I've been using VARCHAR(n) but see that the SQLite documentation only
documents TEXT. Can anyone provide tips or a link to help me decide which of
the two is best? If it makes any difference, I will be storing Unicode text
(16-bits per character).

Thanks!
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