Will the database crash during the update?

Question

1C-Bitrix

There is a need to create a table in the database.
And so for example I will create the new table in a DB.
What happens to the database when the system is updated?
In particular, will my newly created table stay?

Answer 1

Yes.

Answer 2

What happens to the database when the system is updated?

If you create your own table, then nothing will happen to it when updating Bitrix.
Yes, it will remain.
You can use D7 ORM to work with the spreadsheet.