The phrase "a big database" is correct and usable in written English.
It can be used when referring to a database that has a large amount of data or storage capacity.
Example: "The company relies on a big database to manage customer information and track sales."
Alternatives: "a large database" or "an extensive database".
Governments always think like this – they're constantly thinking a big database will solve all the problems.
"GetUp! rely on a big database and they say 'come and protest or write this letter'.
And a shopping site like Amazon.com is, in essence, a big database lashed to the Internet.
There's also a big database of job classifieds, an events diary, training information and a skills builder.
In general, you need a big database and lots of processing power to get the very best results.
Another journalist, said to have a bigger database than Evans, passed details "up the chain of command" inside the newspaper.
But they said they planned in September to offer a fee-based premium service, with a bigger database and more detailed maps.
It then matches this up against a bigger database of offers and products to suggest deals to the shopper in question.
While the above site seems to be getting bigger quick thanks to a recent burst of buzz, an alternative (spotted by Giz) called SpeedSpot seems to have been around a bit longer and thus has a bigger database.
Instead, its value proposition is that it has a bigger database containing the "right" songs (meaning, the good ones), and, most importantly, that's it's available outside the U.S. Also unlike on-demand services, Senzari doesn't have to make deals with record labels to gain access to music – just distributers like SoundExchange, ASCAP, BMI and SESAC in the U.S., and others in different countries.
