SQL, mySQL, postreSQL

[zachogden]

What are the differences between SQL, MSSQL, mySQL, et cetera?

[iDxMan]

I assume by "SQL" you mean the ANSI 92 standard?

Google seemed pretty helpful with a quick search.

http://troels.arvin.dk/db/rdbms/
http://dev.mysql.com/doc/mysql/en/Differences_from_ANSI.html

[sicarius]

They are all Database Management Systems. SQL is a standardized language for performing queries on a database. Most DBMSs try to be SQL compliant, but each ussually has some added and or missing features.