While I did learn something new from your comment, I can't imagine any enterprise shop that's not running Oracle DB or MSSQL. Maybe it's just the bias I have fr

While I did learn something new from your comment, I can't imagine any enterprise shop that's not running Oracle DB or MSSQL. Maybe it's just the bias I have from my job history, but for standard enterprise shops and their OLTP data, is there any competitor to Oracle DB & MSSQL? I know that at my employer they use berekleydb/teradata/hadoop/mainframe systems for different workloads, but the bread and butter is Oracle RAC clusters. Not saying that I think Oracle DB & MSSQL is unbeatable, I'm asking because I am trying to see what exists outside my little biased view.