A true “view” automatically updates when the underlying data is updated. Also, in SQL Server an “indexed view” also refreshes automatically.
If this is an Oracle materialized view, then the view definition can specify the refresh method for automatic refreshing (periodically on a timed basis or whenever an underlying table is changed). You would need to edit the view definition to change this.
If this is an Oracle materialized view with no refresh method specified, you can force a refresh using one of the following Oracle library functions:
DBMS_MVIEW.REFRESH – select one or more materialized views to refresh
DBMS_MVIEW.REFRESH_DEPENDENT – refresh those which depend on a table
DBMS_MVIEW.REFRESH_ALL_MVIEWS – refresh all materialized views
If this is SQL Server, you may want to confirm that this really is a View, and not a real table that someone constructed…