Data Ware Housing through SQL concept

Ahmad Iqbal (09)
Amir Mazhar (65)
Kashif Tangra (42)
Usman Ghani (51)

 Structure Query Language is a computer
language for storing manipulating and
retrieving data stored in Relational Data Base.
 The SQL is an standardized language for
relational database system.
 MySQL , MS Access, Oracle servers use SQL as
a standard language of database

 SQL was invented in 1970. by IBM
(International Business Machine).
 The initial version of SQL is known as SEQUEL,
(structured query language).
 The SQL is developed to manipulate and
retrieve stored data in relational database
management system.

 There are fewer commands through which the
structure query language is controlled or
operated. These Commands are as following:
 Data Definition Language (DDL)
 Data Manipulation Language (DML)
 Data Control Language (DCL)

 The Data Definition Language is a standard
that defines the different structure in a
database.
 Simply we can say that DDL can define the
behavior of a database
 The DDL not just only define the behavior of
database, it can also be modified through
DDL.

 There are few commands for DDL of a
Database, which are following:
 Create- is used to create the database or its objects.
 Drop- is used to delete objects from the database.
 Truncate-is used to remove all records from a table
 Comment-is used to add comments to the data
dictionary.
 Rename-is used to rename an object existing in
the database.

 The DML is deals with the manipulation of
data within the database such as:
 Select- is used to retrieve data from the a database.
 Insert- is used to insert data into a table.
 Update-is used to update existing data within a table.
 Delete-is used to delete records from a database table.

 Syntax.
 SELECT * FROM TABLE;
 Example
 SELECT StudentName,
RollNo FROM StudentID;

 Syntax
 INSERT INTO table_name (column1, column
2, column3, ...)
VALUES (value1, value2, value3, ...);
 Example
 INSERT INTO table_name (Name, Class, Roll
NO)
VALUES (Hassan, BS-IT, 71,);

 Syntax
 UPDATE table_name
SET column1 = value1, column2 = value2, ...
WHERE condition;
 Example
 UPDATE StudentID
SET StudentName=‘Aamir’ WHERE condition;
StudentID=1

 Syntax
 DELETE FROM table_name;
 Example
 DELETE FROM StudentID;
 Syntax
 DELETE FROM table_name WHERE condition;
 Example
 DELETE FROM StudentID WHERE StudentName
=‘Hassan';

 The (DCL) is based on two command, GRANT
command and REVOKE command, these
commands deals with the rights permission
controls of the database system.
 GRANT-gives user’s access permissions to database.
 REVOKE-withdraw user’s access permissions given by
using the GRANT command.

 Syntax
 GRANT privilege_name
ON object_name
TO {user_name |PUBLIC |role_name}
[WITH GRANT OPTION];

 Syntax
 REVOKE privilege_name
ON object_name
FROM {user_name |PUBLIC |role_name}

 An aggregate function allows you to
perform a calculation on a set of values to
return a single scalar value.
 Some aggregate functions.
 AVG-calculates the average of a set of values.
 COUNT-counts rows in a specified table or view.
 MIN- gets the minimum value in a set of values.
 MAX- gets the maximum value in a set of values.
 SUM-calculates the sum of values.

Data Ware Housing through SQL concept

Data Ware Housing through SQL concept

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Data Ware Housing through SQL concept