Data integrity constraints are used to ________________.
Which of the following is NOT a superkey in a relational schema with attributes V, W, X, Y, Z and primary key V Y?
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.
Relational database schema normalization is NOT for:
Fora given basic ER and relational models, which of the following is INCORRECT?
A ________ is a pictorial depiction of the schema of a database that shows the relations in the database, their attributes, and primary keys and foreign keys.
An attribute in a relation is a foreign key if the _______ key from one relation is used as an attribute in that relation.
Which one of the following is a set of one or more attributes taken collectively to uniquely identify a record?
A relational database consists of a collection of
In a relation between the entities, the type and condition of the relation should be specified. That is called as______attribute.
Which of the following can be a multivalued attribute ?
The function that an entity plays in a relationship is called that entity’s _____________
An ________ is a set of entities of the same type that share the same properties, or attributes.
A logical schema_________.
Data independence means_______________.
