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Understanding Databases: Types, Models, and Operations, Study notes of Database Management Systems (DBMS)

Bond University (BU)Database Management Systems (DBMS)

An overview of databases, their types, data models, dbms operations, and advantages. It covers hierarchical, network, relational, and object-based logical models, dbms operations like adding files, inserting, retrieving, modifying, and removing data, and advantages such as data sharing, enhanced security, and better transaction support. The introduction of rdbms and its features are also discussed.

Typology: Study notes

2020/2021

Uploaded on 05/22/2021

naresh-mahato
naresh-mahato 🇦🇺

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bg1
What is database?
Database is a collection of information organized for easy access,
management and maintenance.
Examples;
Telephone directory
Customer data
Product inventory
Visitors register
Weather record
Types of data model
Record data model
1. Hierarchical data model- A hierarchical database model is a
data model in which the data are organized into a tree like
structure.
2. Network base model – The network database model was
created to solve the shortcoming of the hierarchical database
model. In this type of model, a child can be linked to multiple
parents.
3. Relation data model – relation data model is a primary data
model, which is used widely around the world of data storage
and processing
Object based logical model
pf3
pf4

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Download Understanding Databases: Types, Models, and Operations and more Study notes Database Management Systems (DBMS) in PDF only on Docsity!

What is database?

Database is a collection of information organized for easy access, management and maintenance. Examples;  Telephone directory  Customer data  Product inventory  Visitors register  Weather record

Types of data model

Record data model

  1. Hierarchical data model- A hierarchical database model is a data model in which the data are organized into a tree like structure.
  2. Network base model – The network database model was created to solve the shortcoming of the hierarchical database model. In this type of model, a child can be linked to multiple parents.
  3. Relation data model – relation data model is a primary data model, which is used widely around the world of data storage and processing  Object based logical model

Entity relationship model Entity relationship diagram also known as ERD, ED diagram or ER model is a type of structural diagram for use in database design. DBMS operations  Adding new files  Inserting data  Retrieving data  Modifying data  Removing data Advantages of DBMS  Sharing data across application  Enhanced security mechanism  Enforce integrity constrains  Better transaction support  Backup and recovery features Introduction of RDBMS  A relational database refers to a database that stores data in structured format, using rows and columns.  This makes it easier to locate and access specific values within the database.  It is “relational” because the values within each table are related to each other. Tables may also be related to other tables.  The relational structure makes it possible to run queries across multiple tables at once.

SQL connection  SQL server is a database server to manage database.  Data server content all table and any sql sever object like trigger, view,table.  SSMS is a client tool to make connection with database server authentication.  Server name(local)or  Username :sa(system administrator)  Password**  Click to connect.