sorry but my english isn't perfect
Not to worry
I'm not aware of an sql query that will return the dbms name/vendor. If there was one, it would probably be vendor specific and would be against the "common" philosophy of sql being vendor independent.
Maybe the ansi standard will be modified to include such a command.
Just curious, but if there is one, how would it be used? What business requirement/solution might be served by having the "dbms name" available via a query?