1. Introduction
2. Data
3. Database
4. Database System
5. Database Management in Construction Industry
6. Data Processing in Construction IndustryTHE OVERVIEW OF
DATABASE
MANAGEMENT
“We're entering a new world in
...
1. Introduction
2. Data
3. Database
4. Database System
5. Database Management in Construction Industry
6. Data Processing in Construction IndustryTHE OVERVIEW OF
DATABASE
MANAGEMENT
“We're entering a new world in which
data may be more important than
software”
-Tim O'ReillyWHAT IS DATA?
Data are information, quantities, characters, or
symbols on which operations are performed by
a computer, being stored and transmitted in
the form of electrical signals and recorded on
magnetic, optical, or mechanical recording
media.
Data refers to discrete facts, such as numbers.
Data can be structured to create information,
organized to produce knowledge and applied
to give wisdom, for example, allowing decisions
to be made. In terms of the digital economy,
data is often described as being the ‘new oil’.
Data can be measured, collected, analyzed,
and represented in visual form using images,
graphs and other analytical tools.What is Raw data?
Raw Data (or unprocessed) data is in the form of
numbers and characters that have not been
‘cleaned’/corrected to remove outliers or obvious data
entry errors. Field data refers to raw data that is
collected in an uncontrolled in situ environment.
.WHAT IS DATABASE?
Database is a collection of persistent data that
is used by the application system of some
given enterprise
Enterprise -a generic term for any reasonably
self-constrained commercial, scientific,
technical or other organization. This might be a
single individual (with small, personal
database) or a complete corporation or similar
large body (with a large shared database) or
anything in between. Here are some examples:
Manufacturing Company
Bank
University
Government DepartmentAny enterprise must necessarily maintain a lot of data
about its operations. The data is the “persistent data”
referred to in the definition. The enterprise just mentioned
would typically include the following(respectively)
among the persistent data:
Product Data
Account Data
Patient Data
Student Data
Planning Data
.What is database system?
A database system is basically a computerized record
keeping system
It is a computerized system whose overall purpose is to store
information and to allow users to retrieve and update that
information on demand.
Database system are available on machine that ranges all
the way from smallest handheld or personal computers to
the largest mainframes or cluster of mainframes. The facilities
provided by any given system are determined to some
extend by the size and power of the underlying machine.
Multi-user system-is a system in which many users can
access the database at the same time and tend to be from
large machines.
Single-user system-is a system in which at most on user can
access the database at any given time by the small
machines.
.Compactness
•There is no
need for possibly
voluminous
paper files.
Speed
•The machines can
retrieve and update
data far faster that
a human can. In
particular, ad-hoc,
spur-of-the moment
queries can be
answered quickly
without and timeconsuming manual
or visual searches.
Less
Drudgery
•Much of the
sheer tedium of
maintaining files
by hand is
eliminated.
Mechanical
tasks are always
better than
machines
Currency
•Accurate, upto-date
information is
available on
demand at any
time.
Protection
•The data can
better protected
against
unintentional loss
and unlawful
access.
WHY DATABASE?
Why use a database system? What are the advantages? The advantages of the
database system over traditional, paper-based method of record-keeping are
perhaps easier to see in these cases. Here are some of them:Database Management in Construction Industry
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