SQLite: what happens if two (or more) people want to access to the same data base file ?

Thank you Dave.

The process is so fast, we have hard time to see it, excepted if the data base file is in a USB MemoryStick. I saw wal file in the above condition (I think).

OK, I will explorate PostgreSQL a bit more. At first sight, and for CREATE TABLE, the code seems to be nearly the same. I’d better create a new TABLE and learn from there (I have a bit of time, so I can do that).