[Tutor] Opening and closing SQLite db

[Noah Hall]

As a rule, I tend to open and close a connection based on what I'm doing
with the database. If I were to directly run a series of queries one after
another, I would keep it open until a change in interface (referring to
changes in objects, both masters and slaves).
Also, you can perform any query that does not change any records safely
without a commit, for example, searches. For everything else, you need to
call commit - but you don't need to close the connection.
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