Questions

SQL statements are broadly classified into three. They are

1. DDL – Data Definition Language

DDL is used to define the structure that holds the data. For example, Create, Alter, Drop and Truncate table.

2. DML – Data Manipulation Language

DML is used for manipulation of the data itself. Typical operations are Insert, Delete, Update and retrieving the data from the table. The Select statement is considered as a limited version of the DML, since it can't change the data in the database. But it can perform operations on data retrieved from the DBMS, before the results are returned to the calling function.

3. DCL – Data Control Language

DCL is used to control the visibility of data like granting database access and set privileges to create tables, etc. Example - Grant, Revoke access permission to the user to access data in the database.

The central nervous system CNS is responsible for integrating sensory information and responding accordingly.

It consists of two main components::

 1. The brain

 2. The spinal cord

The brain is the center of our thoughts, the interpreter of our external environment, and the origin of control over body movement. The brain can be divided into four main lobes: temporal, parietal, occipital and frontal.

The spinal cord serves as a conduit for signals between the brain and the rest of the body.

A Book always has Pages. Without pages it can't be called as a book. A book can be either with or without preface, text or index but it can't be without a page.

Hence, A Book always has page.

True, the greenhouse effect is caused solely by human activities such as deforrestation, depletion of natural resources and emission of CO2 by using vehicles, refrigerators and AC's.

The push or pull on an object that causes it to move or stop or change direction is called as Force.

Along any transmission path from a given source to a given destination, a group of virtual circuits can be grouped together into what is called path.