Hi everyone,
I try to check database management system which is most used or which is most valueable in the world. I found a website like compare the databases for general structure.
I compared them on a link, you can check below, but i didnt understood to why mysql is not used in big data. If anyone can answer this question, you can contact me on about-contact page.
http://db-engines.com/en/system/DB2%3BMicrosoft+SQL+Server%3BMySQL%3BOracle%3BPostgreSQL
By the way, if you want to follow rank of databases you can catch on below link;
http://db-engines.com/en/ranking/relational+dbms
Cheers,
Talih Bayram