Fundamentals of database system - Database System Concepts and ArchitectureMustafa Kamel Mohammadi
In this chapter you will learn
DBMS evolution
Data model
Three schema architecture
DBMS language
DBMS interfaces
DBMS components
Classification of DBMS
This is the Briefly introduction to Database system with the help of comparison with the previous technology file Base System. In this lecture reader will be able to understand the fundamental concept of the Database System and know about the all primer Concept of the Database system. This lecture will helpful for those, who are lack or less knowledge about the Database System.
Database management system full theory portion is covered. It's helpful to students who are in any management courses.all the best to all of you, this ppt might be helpful for you.Database management system full theory portion is covered. It's helpful to students who are in any management courses.all the best to all of you, this ppt might be helpful for you.Database management system full theory portion is covered. It's helpful to students who are in any management courses.all the best to all of you, this ppt might be helpful for you.Database management system full theory portion is covered. It's helpful to students who are in any management courses.all the best to all of you, this ppt might be helpful for you.
Have you ever wondered how search works while visiting an e-commerce site, internal website, or searching through other types of online resources? Look no further than this informative session on the ways that taxonomies help end-users navigate the internet! Hear from taxonomists and other information professionals who have first-hand experience creating and working with taxonomies that aid in navigation, search, and discovery across a range of disciplines.
Fundamentals of database system - Database System Concepts and ArchitectureMustafa Kamel Mohammadi
In this chapter you will learn
DBMS evolution
Data model
Three schema architecture
DBMS language
DBMS interfaces
DBMS components
Classification of DBMS
This is the Briefly introduction to Database system with the help of comparison with the previous technology file Base System. In this lecture reader will be able to understand the fundamental concept of the Database System and know about the all primer Concept of the Database system. This lecture will helpful for those, who are lack or less knowledge about the Database System.
Database management system full theory portion is covered. It's helpful to students who are in any management courses.all the best to all of you, this ppt might be helpful for you.Database management system full theory portion is covered. It's helpful to students who are in any management courses.all the best to all of you, this ppt might be helpful for you.Database management system full theory portion is covered. It's helpful to students who are in any management courses.all the best to all of you, this ppt might be helpful for you.Database management system full theory portion is covered. It's helpful to students who are in any management courses.all the best to all of you, this ppt might be helpful for you.
Have you ever wondered how search works while visiting an e-commerce site, internal website, or searching through other types of online resources? Look no further than this informative session on the ways that taxonomies help end-users navigate the internet! Hear from taxonomists and other information professionals who have first-hand experience creating and working with taxonomies that aid in navigation, search, and discovery across a range of disciplines.
This presentation by Morris Kleiner (University of Minnesota), was made during the discussion “Competition and Regulation in Professions and Occupations” held at the Working Party No. 2 on Competition and Regulation on 10 June 2024. More papers and presentations on the topic can be found out at oe.cd/crps.
This presentation was uploaded with the author’s consent.
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f you offer a service on the web, odds are that someone will abuse it. Be it an API, a SaaS, a PaaS, or even a static website, someone somewhere will try to figure out a way to use it to their own needs. In this talk we'll compare measures that are effective against static attackers and how to battle a dynamic attacker who adapts to your counter-measures.
About the Speaker
===============
Diogo Sousa, Engineering Manager @ Canonical
An opinionated individual with an interest in cryptography and its intersection with secure software development.
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James Wilson, Orkestra and Deusto Business School
Emily Wise, Lund University
Madeline Smith, The Glasgow School of Art
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Introducing Acorn Recovery as a Service, a simple, fast, and secure managed disaster recovery (DRaaS) by IP ServerOne. A DR solution that helps restore your IT infra within minutes.
2. Conte
nt
What is Database Management System?
Why Use a DBMS?
Purpose of DBMS
levels or layers of DBMS
Components of DBMS
Advantage of DBMS
Disadvantage of DBMS
DBMS Languages
3. What is Database Management
System?
A Database Management System (DBMS), or simply a Database
System (DBS) consist of :
A collection of interrelated and persistent data (usually referred
to as the database (DB)).
A set of application programs used to access, update and
manage that data (which form the data management system
(MS)).
4. Why Use a DBMS?
Data independence and efficient access.
Reduced application development time.
Data integrity and security.
Uniform data administration.
Concurrent access, recovery from crashes.
5. Purpose of DBMS
1. Data redundancy and inconsistency
Same information may be duplicated in several places.
All copies may not be updated properly.
2. Difficulty in new program to carry out each new task
3. Data isolation —
Data in different formats.
Difficult to write new application programs.
files and formats
6. Purpose of DBMS …
Security problems
Difficult to enforce this with application programs.
Data restrictions
Integrity problems
Data may be required to satisfy constraints.
Again, difficult to enforce or to change constraints with the
file-processing approach.
7. levels or layers of DBMS
External Level: - External Level is described by a schema i.e.
it consists of definition of logical records and relationship in
the external view.
Conceptual Level: - Conceptual Level represents the entire
database. Conceptual schema describes the records and
relationship included in the Conceptual view.
Internal Level: - Internal level indicates hoe the data will be
stored and described the data structures and access method to
be used by the database.
9. Advantage of DBMS
Controlling Redundancy
Sharing of Data
Data Consistency
Integration of Data
Integration Constraints
Data Security
Report Writers
Control Over Concurrency
Backup and Recovery Procedures
Data Independence
10. Disadvantage of DBMS
Cost of Hardware and Software
Cost of Data Conversion
Cost of Staff Training
Appointing Technical Staff
Database Damage
11. DBMS Languages
Data Definition Language-DDL
Data Definition Language (DDL) statements are used to
define the database structure or schema.
Some examples:
CREATE - to create objects in the database
ALTER - alters the structure of the database
DROP - delete objects from the database
TRUNCATE - remove all records from a table, including all
spaces allocated for the records are removed
COMMENT - add comments to the data dictionary
RENAME - rename an object
12. Data Manipulation Language
(DML)
Data Manipulation Language (DML) statements are used for
managing data within schema objects.
Some examples:
SELECT - Retrieve data from the a database
INSERT - Insert data into a table
UPDATE - Updates existing data within a table
DELETE - deletes all records from a table, the space for the
records remain
MERGE - UPSERT operation (insert or update)
CALL - Call a PL/SQL or Java subprogram
EXPLAIN PLAN - explain access path to data
LOCK TABLE - control concurrency