The phrase "a database of tens" is correct and usable in written English.
It can be used when referring to a database that contains a collection or list of items, specifically in the quantity of tens.
Example: "The research team created a database of tens to analyze the survey responses from participants."
Alternatives: "a collection of tens" or "a list of tens".
Indigo has built a database of tens of thousands of individual microbes isolated from crops that thrive under harsh conditions.
Sony's Digital Reality Creation technology compares each line with a database of tens of thousands of digital video patterns and picks one to approximate a high-definition image.
But in a preview of the demonstration this week, Mr. Glaser showed how consumers would be able to locate and download music from a database of tens of thousands of songs.
When serving ads for content sites, both Overture and Google employ technology that infers the topic of a page by scanning for words and phrases, searching through a database of tens of thousands of advertisers, then delivering a relevant text ad.
The firm maintains a database of tens of thousands of coin, comic and memorabilia collectors, many of whom enter their want lists on the Heritage Web site.
The objective of Scribblenauts, as implied by its catchphrase "Write Anything, Solve Everything", is to complete puzzles to collect "Starites", helped by the player's ability to summon any object (from a database of tens of thousands) by writing its name on the touchscreen.
Last year, companies claimed they could compare live feeds to a database of billions of faces.
WikiLeaks released a database of thousands of Clinton's emails in March that year, obtained through a freedom of information request.
A team led by Markus Schläpfer of the Massachusetts Institute of Technology in Cambridge used a database of billions of telephone calls from Portugal and the United Kingdom to measure social connectivity.
So far, Dima has helped to build a database of hundreds of thousands of small molecules and proteins, detailing their chemical structures and binding properties.
The police operation which has been penetrating political groups for 40 years has been compiling a database of thousands of activists around the country.
