The worldwide relational database management systems market saw a 12.6% growth spike in 2007 to $18.8 bln compared to $16.7 bln in 2006, according to IDC. Oracle took the top spot, capturing 44.3% of the market with revenue growth of 13.3%. IBM came in second with a 21% share, also logging a 13.3% revenue growth rate. It was followed by Microsoft, with 18.5% of the market and a 14% jump in revenue. iSybase and Teradata rounded out the top five, garnering market shares of 3.5% and 3.3%, respectively.