CBSE Class 12 Informatics Practices Database Fundamentals MySQL Revision Tour Worksheet

Read and download free pdf of CBSE Class 12 Informatics Practices Database Fundamentals MySQL Revision Tour Worksheet. Students and teachers of Class 12 Informatics Practices can get free printable Worksheets for Class 12 Informatics Practices Database Fundamentals MySQL Tour in PDF format prepared as per the latest syllabus and examination pattern in your schools. Class 12 students should practice questions and answers given here for Informatics Practices in Class 12 which will help them to improve your knowledge of all important chapters and its topics. Students should also download free pdf of Class 12 Informatics Practices Worksheets prepared by school teachers as per the latest NCERT, CBSE, KVS books and syllabus issued this academic year and solve important problems with solutions on daily basis to get more score in school exams and tests

Worksheet for Class 12 Informatics Practices Database Fundamentals MySQL Tour

Class 12 Informatics Practices students should refer to the following printable worksheet in Pdf for Database Fundamentals MySQL Tour in Class 12. This test paper with questions and answers for Class 12 will be very useful for exams and help you to score good marks

Class 12 Informatics Practices Worksheet for Database Fundamentals MySQL Tour

CBSE Class 12 Informatics Practices Database Fundamentals Mysql Revision Tour. Students can download these worksheets and practice them. This will help them to get better marks in examinations. Also refer to other worksheets for the same chapter and other subjects too. Use them for better understanding of the subjects.

UNIT 3

CHAPTER 13: DATABASE FUNDAMENTALS - MYSQL REVISION TOUR

Database: Collection of logically related data stored in a structure format.

DBMS: Software used to manage databases is called Data Base Management System (DBMS).

RDBMS: A DBMS used to manage Relational Databases is called an RDBMS (Relational Data

Base Management System). Some popular RDBMS software available are: Oracle, MySQL,

Sybase, and Ingress.

Benefits of using a DBMS are:

a. Redundancy can be controlled b. Inconsistency can be avoided

c. Data can be shared d. Security restrictions can be applied.

MySQL: It is an Open Source RDBMS Software. It is available free of cost.

Relation/Table: A table refers to a two dimensional representation of data arranged in columns

(also called fields or attributes) and rows (also called records or tuples).

Key: A column or a combination of columns which have some specific characteristics in a relation

e.g. are Primary Key, Candidate Key and Foreign Key etc.

Primary Key: The group of one or more attribute(s) used to uniquely identify each row/tuple of a

relation/table is called its Primary Key.

Candidate Key: A group of columns which can be set as the primary key of a relation is called a

candidate key because it is one of the candidates available to be the primary key of the relation.

Alternate Key: A candidate key of a table which is not set as primary key is called its Alternate Key.

Degree is the number of columns/attributes in the table.

Cardinality is the number of rows/tuples in a table.

SQL (Structured Query Language): It is the language used to manipulate and manage databases

and tables within them using an RDBMS. There are following four types of SQL commands:

1. DDL (Data Definition Language): Deals with the Structure (create, remove, or modify) of

databases and tables e.g. CREATE, DROP, ALTER.

2. DML (Data Manipulation Language): Used to manipulate data/ values within tables e.g.

INSERT, UPDATE, DELETE.

3. DCL (Data Control Language): Used to control the access to the databases and tables e.g.

GRANT, REVOKE.

4. TCL(Transaction Control Language): used to manage and control the transaction e.g.

COMMIT , ROLLBACK, SAVEPOINT

Some Commonly used DDL Command are as follows:-

SNo Command, Syntax and Purpose

1 Command : Create Database

Syntax: Create database ;

Purpose: Creates a database with specified name

2 Command : Create Table

Syntax: Create Table

( , Data Type1,, Data Type2);

Purpose: Creates a table with specified name

 

3 Command : Alter Table

Syntax: Alter Table

Add Data Type1;

Alter Table

Drop ;

Alter Table

Modify ;

Purpose: Modify the strcture of a table

4 Command : Use

Syntax: Use ;

Purpose: Open the specified database for use

5 Command : Select Database( )

Syntax: : Select Database( );

Purpose: Show the name of current Database

6 Command : Show tables;

Syntax: : Show tables ;

Purpose: Show a list of tables in the current database

7 Command : Show databases;

Syntax: : Show databases;

Purpose: Show a list of databases

8 Command : Insert

Syntax : Insert Into

( ,….,values

(

Purpose: Insert Data into the table

9 Command : Select

Syntax: Select * Column name, Expression,Column name From table Name Where

Condition Order by Column Name Asc/Desc ;

Purpose: To reterive selected data from the table

10 Command : Describe

Syntax: : Desc

;

Purpose: Show structure of table

11 Command : Update

Syntax: : Update

Set =Value

Where ;

Purpose: Update or Modify the data in tables

Following are the clauses which can be used with select command

SNo CLAUSE EXPLANATION

1 DISTINCT Used to display distinct values from a column of a table

2 WHERE Used to specify the condition based on which rows of a table are dispalyed

3 BETWEEN Used to define the range of values within which the column values must fall to

make a condition true. It include both upper and lower values.

4 IN Used to select values that natch any values in a lsit of specified values

5 LIKE Used for pattern matching of string data using wildcard characters % and _

6 IS NULL/ NOT Used to select rows in which the specified column is NULL (or is NOT NULL)

 

 

Please click the link below to download CBSE Class 12 Informatics Practices Database Fundamentals Mysql Revision Tour

Chapter 02 Data Handling using Pandas – I
CBSE Class 12 Informatics Practices Data Handling using Pandas Worksheet
More Worksheets for Class 12 Informatics Practices
CBSE Class 12 Informatics Practices Commonly Used Libraries Worksheet
CBSE Class 12 Informatics Practices Computer Networking Worksheet
CBSE Class 12 Informatics Practices Computer Xml Extensible Markup Language Worksheet
CBSE Class 12 Informatics Practices Concept Of Inheritance Worksheet
CBSE Class 12 Informatics Practices Database Connectivity To MySQL Worksheet
CBSE Class 12 Informatics Practices Database Fundamentals MySQL Revision Tour Worksheet
CBSE Class 12 Informatics Practices Database Transactions Worksheet
CBSE Class 12 Informatics Practices File Handling Worksheet
CBSE Class 12 Informatics Practices Html Basic Html Elements Worksheet
CBSE Class 12 Informatics Practices Html Lists Tables And Forms Worksheet
CBSE Class 12 Informatics Practices Introducing Classes And Objects Worksheet
CBSE Class 12 Informatics Practices It Applications Worksheet
CBSE Class 12 Informatics Practices Java Application Worksheet
CBSE Class 12 Informatics Practices Java Gui Programming Revision Worksheet
CBSE Class 12 Informatics Practices Java Gui Programming Worksheet
CBSE Class 12 Informatics Practices More On Sql Grouping Records And Table Joins Worksheet
CBSE Class 12 Informatics Practices MySQL Worksheet
CBSE Class 12 Informatics Practices Networking Worksheet
CBSE Class 12 Informatics Practices Open Source Concepts Worksheet
CBSE Class 12 Informatics Practices Sure Shot Questions Worksheet
CBSE Class 12 Informatics Practices Sure Shot Questions Worksheet Set A
CBSE Class 12 Informatics Practices Table And Integrity Constraints Worksheet
CBSE Class 12 Informatics Practices Web Application Development Worksheet