About DB Views: Views are customized presentations of data in one or more tables or other views. You can think of them as stored queries. Views do not actually contain data, but instead derive their data from the tables upon which they are based. These tables are referred to as the base tables of the view. Similar to tables, views can be queried, updated, inserted into, and deleted from, with some restrictions. All operations performed on a view actually affect the base tables of the view. Views can provide an additional level of security by restricting access to a predetermined set of rows and columns of a table. They can also hide data complexity and store complex queries. Create Views: Open SQL Developer and connect the connection (DEV, UAT, Prod), Write the desired query. Now expand the db and find the Views and right click and select the "New View" A new window will appear. Paste the query your have prepared before and provide the appropriate new and click on OK button....