There are several "database field" add-ons available in the marketplace, not just the one you've found. All worth a look, as they're all different (barring the commonality that they get database data into a field).
From https://marketplace.atlassian.com/search?query=database%20field
I've used about half, and I think the others in there you might want to look at are nFeed, Kepler, and Database Fields. The others are less field-data based and head more towards reporting but still might be worth a look.
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