Download Database Management System(DBMS)

It refers to the software used to manage the database.
Database Management:
 Is a computer software made for organizing, analyzing
and modifying the information stored in a database.
 It is a set of programs that helps in controlling the
organization's storage and retrieval of data in a database.
 It helps manage the design process and builds a bridge
between the design chain and extended enterprise for
optimal design and resource management.
USES OF A DBMS
It manages the following:
 The structure of individual files
 Relationships between data items and data files
 How data is integrated
 Properties of a database
Types Of DBMSs
 Hierarchical database management systems
 Network database management systems
 Relational database systems
Examples of DBMS:





Oracle
Microsoft Access
Microsoft SQL server
Firebird
FileMaker
Hierarchical database
management systems
 Its main use is in folder/file organisation like the folder
structure used on Windows operating system.
 It uses tree-like structure similar to a family tree
system.
 It allows fast access to data but large amounts of data
are bypassed as levels increase
 They are no longer used because they use a one way
relationship.
Network Database Management
Systems
 It is mainly used by distributed database systems
 Parts of a database are stored on smaller database




linked through WANs or LANS
Many of the parts are duplicated so data is less likely to
be lost
It appears to the user to be a single system
Duplication enables faster processing
It is an old technology that is still widely used
Relational Database Systems
 It consists of a number of tables that are related in
some way
 Each table has a key field
 Data from one table can be combined with data from
other tables for creating reports e.g from a grdaes and
personal details table
 The standard programming language for relational
tables is the structured query language(SQL).
MICROSOFT ACCESS SCREEN SHOTS:
Advantages of Relational Database
Mangement Systems
 Data is not repeated and therefore does not waste




valuable resources
Separate tables connected by a key field are used
Data retrieval is also quicker
Data is not duplicated across several files which is
more secure.
There is room for expansion. The database can be
extended with more data and tables