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kszunzun 0 Newbie Poster

Hi,
I have a distributed DB , comprising of 800 db servers (huge data for a social networking company). the records are sorted in db based on user_account _id, and the table also has user's credit card number , now - given a credit card number I need to find out if it exists in any of those 800 data bases ? can I designe some kind of index on distributed db?please help ...urgently needed...

Thnaks,
Shipra

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