What are the restrictions that are put on update operations using views?

What are the restrictions that are put on update operations using a view?

Restrictions on Updating Data Through ViewsIf the view contains joins between multiple tables, you can only insert and update one table in the view, and you can't delete rows.You can't directly modify data in views based on union queries.

Which are the restrictions on view?

Restrictions for using views.You can create a view only in the current database.The number of columns referenced by a view cannot exceed 1024.You cannot create a view on a temporary table.You cannot create a trigger or build an index on a view.

What are the problems associated with updating views?

Problems in updating Views: Updating of views is complicated and can be ambiguous task. ii. In general, an update on a view defined on a single table without any aggregate functions can be mapped to an update on the underlying base table under certain conditions. iii.

What restrictions are necessary to ensure that a view is updatable?

If you want a join view to be updatable, then all of the following conditions must be true:The DML statement must affect only one table underlying the join.For an INSERT statement, the view must not be created WITH CHECK OPTION , and all columns into which values are inserted must come from a key-preserved table.