Fusion Tables works with pretty much any data sets to which a user has read access. The visualizations can be embedded into a website, where they remain interactive.

"One of the big goals of Fusion Tables is to enable many people to work with databases," said Alon Halevy, Google's head of structured data research, in an interview last week.

"Databases are known to be the hardest known software beasts ever created by man or woman. A lot of the people that have data and want to tell stories about their data, share it and visualize it, are people who don't have database expertise, or don't even have access to database expertise," he said.

Even with the new features, Fusion Tables isn't as intuitive as some other Google products, but it is one of the easier-to-use among the . Users don't need any coding expertise to use it, for example.

Google says millions of tables have been created using Fusion Tables.