Answered Questions

  • What is materialized view?

    Habib Ali

    • May 9th, 2016

    A view (typically a complex query containing Joins & Aggregates) which stores its result in a DB Table. Can be cached for faster performance. Its highly used in Data Warehousing Environments, but use it carefully as it has lot of restrictions based on clauses and the underlying query

    sachin rasal

    • Dec 11th, 2015

    Materialised view - A table on a disk that contains the result set of a query

    Non-materiased view - A query that pulls data from the underlying table

  • What are the built_in used to trapping errors in forms 4?

     Error_type      return character   Error_code      return number   Error_text       return char   Dbms_error_code   return no.   Dbms_error_text     return char

  • Can a view be updated/inserted/deleted? If Yes under what conditions ?

    A View can be updated/deleted/inserted if it has only one base table if the view is based on columns from one or more tables then insert, update and delete is not possible.

    Maheswara Raju. Varakavi

    • Aug 29th, 2016

    If a view is updated, deleted , or inserted will the changes be reflected on the base table? YES--> If it is in the case of simple view (which consists only one base table). NO---->If it is in the c...

    Mahendra K Garnayak

    • Jun 7th, 2016

    Thanks M.R. Varakavi for providing a valuable information.
    could you please confirm in instead of trigger action will be performed on which table in case of join condition