1. DDL TRIGGERhttps://technet.microsoft.com/en-us/library/ms190989%28v=sql.105%29.aspxhttps://msdn.microsoft.com/en-us/library/ms175941.aspx2. DML TRIGGERhttps://sites.google.com/site/sqlserverhaitran/https://msdn.microsoft.com/en-us/library/ms178110.aspx3. http://www.pythian.com/blog/sql-server-troubleshooting-logon-triggers/4. https://msdn.microsoft.com/en-us/library/ms131093(SQL.100).aspx5. S khc nhau gia tringger v store product