Database Management Systems Quiz

An organized collection of data or a type of data store based on the use of a database management system (DBMS).

Database Management System.

The sum total of the database, the DBMS and the associated applications.

<p>On a file system.</p> Signup and view all the answers

<p>Includes data modeling, efficient data representation and storage, query languages, security and privacy of sensitive data, and distributed computing issues.</p> Signup and view all the answers

<p>PL/SQL is a procedural language extension for SQL. It allows the user to write procedural code, such as functions, procedures, and packages, within the database. An example of a PL/SQL function is a simple function to calculate the square of a number:</p> <p>CREATE OR REPLACE FUNCTION calculate_square (n NUMBER) RETURN NUMBER IS BEGIN RETURN n * n; END; /</p> Signup and view all the answers

<p>The purpose of PL/SQL in a database system is to provide a way to execute procedural logic within the database. This allows for better performance, tighter security, and easier maintenance of code.</p> Signup and view all the answers

<p>PL/SQL differs from SQL in that it is a procedural language that can include constructs such as loops, conditional statements, and exception handling. SQL, on the other hand, is a declarative language used for querying and manipulating data in a database.</p> Signup and view all the answers

<p>PL/SQL is a procedural language extension for SQL that allows users to create stored procedures, functions, and triggers in the Oracle database. It combines the data manipulation power of SQL with the processing power of procedural languages. An example of a PL/SQL function is as follows:</p> <p>CREATE OR REPLACE FUNCTION get_employee_name (emp_id IN NUMBER) RETURN VARCHAR2 IS emp_name VARCHAR2(100); BEGIN SELECT first_name INTO emp_name FROM employees WHERE employee_id = emp_id; RETURN emp_name; END;</p> Signup and view all the answers