Thanks to Alex Nuijten http://nuijten.blogspot.ae/2015/04/refresh-multiple-materialized-views-in.html To refresh multiple Materialized Views you can use the DBMS_MVIEW package, with the procedure aptly…

  Thanksto DBA Lounge – the below is very useful for understanding materialized view in oracle 11g http://www.reachdba.com/showthread.php?502-Materialized-Views-Complete-and-Fast-Refresh-in-11g-Oracle-Database