“Performing a refresh operation requires temporary space to rebuild the indexes and can require additional space for performing the refresh operation itself.” “Not all materialized views may be fast refreshable. Therefore, use the package DBMS_MVIEW.EXPLAIN_MVIEW to determine what refresh methods are available for a materialized view.” Refresh methods: Incremental : Two types: logg-based refresh and partition change tracking (PCT). “The incremental refresh is commonly called FAST refresh as it usually performs faster than the complete refresh.” Complete refresh DBMS_MVIEW package DBMS_MVIEW.REFRESH DBMS_MVIEW.REFRESH_ALL_MVIEWS DBMS_MVIEW.REFRESH_DEPENDENT Traditional methods: FAST (‘F’), COMPLETE (‘C’), PCT…