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Answer Posted / santosh kumar
View is the logical representation of subset of data from
one or more table.(This is database object but depends on
the table).
there are two types of view.....
1. simple view
2. complex view
SIMPLE VIEW
note:- 1. based on one table.
2. We can perform dml in this.
3. can not contain group function.
4. can not contain group by clause.
5. dml can not be perform when the base table have
not null(primary key, not null) constraint on
any column and that is not selected in the view.
COMPLEX VIEW
note:- 1. based on one or more table.
2. We can perform dml in this always.
3. can contain group function.
4. can contain group by clause.
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