SQL Schema Authorization and Alter Commands Quiz

To hide certain attributes or tuples from unauthorized access.

DROP TABLE TABLE_NAME;

The definition of a base table or other named schema elements.

<p>Creating tables, inserting data, giving constraints, using basic commands, and writing queries.</p> Signup and view all the answers

<p>Various data types like integer, char, varchar, etc.</p> Signup and view all the answers

<p>CREATE TABLE is used to create a new table in SQL. It includes specifying columns and their data types.</p> Signup and view all the answers

<p>View materialization involves physically creating a temporary or permanent view table when the view is first queried or created.</p> Signup and view all the answers

<p>A view with a single defining table is updatable if the view attributes contain the primary key of the base relation, as well as all attributes with the NOT NULL constraint that do not have default values specified.</p> Signup and view all the answers

<p>Views defined on multiple tables using joins are generally not updatable because the underlying data may not be uniquely identifiable for updates.</p> Signup and view all the answers

<p>An inline view in SQL is a view that is defined within the scope of a single SQL statement and is not stored in the database schema.</p> Signup and view all the answers

<p>No, views defined using grouping and aggregate functions are not updatable in SQL.</p> Signup and view all the answers

<p>To ensure that a column cannot contain NULL values.</p> Signup and view all the answers

<p>By appending the DEFAULT clause to the attribute definition.</p> Signup and view all the answers

<p>To restrict domain or attribute values based on specified conditions.</p> Signup and view all the answers

<p>Views are virtual tables derived from other tables in the database.</p> Signup and view all the answers

<p>View implementation creates a logical view, while view materialization creates a physical copy of the view.</p> Signup and view all the answers

<p>View authorization defines who has access to a view and what operations they can perform on it.</p> Signup and view all the answers