In DBMS, view refers to the result set of the stored query on the data. The view can contain anything, including numeric or string articles, so long as the column permits it. In addition, a view is just a virtual table with no physical presence on the drive. A referential integrity constraint refers to the foreign key column in a table. Every value in the the foreign key column will be found in the primary key of the table unless there is an option for “null.” Many coding experts consider the referential integrity constraint to be the most important type of restraint imposed upon relational databases.