Do you have to save a database?

[Andrew Keller <andrew at kellerfarm dot com>]

I am making an app that queries a large list of items for certain 
things.  The list of things to be queried is created on startup and 
does not need to be saved.  All my research on databases say that you 
need to save a database on the hard drive in order to use it.  Is there 
any way to create a temporary database that only exists in memory?  Or 
should I use a different control?

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