In an ER diagram, Entity types are represented by

In an ER diagram, attributes are represented by?

In Hierarchical Model records are organized as

............ are the properties of entities.

Which of the following is not a valid operator for the WHERE Clause

Which of the following is generally used for performing tasks like creating the structure of the relations, deleting relation?

A table is a collection of relationships, there is a close correspondence between concept of

The union of primary keys of the related entity sets becomes a -------------------------- of the relation ?

Address field of a person should not be part of primary key, since it is likely to ?

Which of the following provides the ability to query information from the database and insert tuples into, delete tuples from, and modify tuples in the database?

A _________ integrity constraint requires that the values appearing in specified attributes of any tuple in the referencing relation also appear in specified attributes of at least one tuple in the referenced relation.

In Hierarchical model records are organised as

.......... is an attribute or collection of attributes that uniquely identifies an entity among entity set.

Which statement is used to extract data from a database?

In a relational Database a referential integrity constraint cab be specified with the help of

In the relational model, cardinality is termed as

In relational model, the row of table is known to be ?

The level of data abstraction which describes how the data is actually stored is

What will be the degree and cardinality of the cartesian product of two tables if the degree of first table is 3 and second table isThe cardinality of first table isand cardinality of second table is 6.

In the architecture of the Database System, external level is the