Hackers exposed the vulnerability in public byon their Forum. Google Lab Website has SQL Injection Vulnerability and dangerous thing is this Vulnerability is Exploitable. Google insist that there has been no intrusion. The company claims that their GQL database won’t allow SQL injection attacks. They say that the data that appears in the screen shots, does not exist anywhere in their data stores. Hackers are able to get Tables, columns and data from Database. Google Lab Database has his own customize DB system. But interesting things is their database system is Similar as Ms Access database.
Source: https://thehackernews.com/2011/06/sql-injection-vulnerability-in-google.html