Here are some good reasons for it: http://stackoverflow.com/questions/3756100/how-did-sql-become-the-dominant-database-language http://stackoverflow.com/questio

Here are some good reasons for it: http://stackoverflow.com/questions/3756100/how-did-sql-become-the-dominant-database-language http://stackoverflow.com/questions/3756100/how-did-sql-becom... In particular, you can read this book: http://www.nap.edu/openbook.php?record_id=6323&page=159 http://www.nap.edu/openbook.php?record_id=6323&page=159