Schengen countries apply common procedures on the EU's external borders and their police forces have a common database.

BBC: EU warned against changing Schengen deal on borders

The driving goal behind Infochimps is to connect every public and commercially available database in the world to a common platform.

FORBES: Taking Stock of Data Markets: A Survey of Four Options

Positing a trend from a single database without any supporting historical information has become a common media practice in discussing climate.

FORBES: Connect

In this case, the hundreds of thousands of attacked sites have something in common: They're all hosted on servers running either Microsoft 's Internet Information Services software or its SQL database software.

FORBES: Magazine Article