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Questions and Answers

What is a semantic integrity constraint based on?

The data types used in the database

The specific application semantics (correct)

The underlying database model

The normalization rules followed

Which SQL feature allows expressing some semantic integrity constraints?

CREATE TABLE

CREATE INDEX

CREATE TRIGGER (correct)

CREATE VIEW

Which integrity constraints can be expressed using the CREATE TABLE statement in SQL?

Keys, null value permissibility, and referential integrity (correct)

Complex business rules

Semantic integrity constraints

Triggers and assertions

Which operation is used to add a new tuple (row) to a relation (table)?

INSERT Signup and view all the answers

What should update operations on a relation ensure?

Integrity constraints are maintained Signup and view all the answers

What is a candidate key in SQL?

A unique constraint on one or more columns Signup and view all the answers

Which constraint ensures that a value in one table must exist in another related table?

Referential integrity constraint Signup and view all the answers

What is an entity integrity constraint?

Ensures that primary key values are unique and not null Signup and view all the answers

Which type of constraint restricts the values that can be entered in a column?

Domain constraint Signup and view all the answers

What is a relational integrity constraint?

Ensures that data in one table is consistent with data in another related table Signup and view all the answers