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Summary IT Theory - Information and Database Management R80,00   Add to cart
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Summary IT Theory - Information and Database Management
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Full summary, according to SAGS document, of IEB Information Technology Theory - Information and Database Management section.

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  • February 6, 2024
  • 2
  • 2023/2024
  • Summary

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INFORMATION MANAGEMENT
Stored data

Threats to
quality data
Corrupted data -s hard drive failure &RAID , backup , audit trials

->
human error data validation
, minimise user privileges
-> UPS Redundant power
power
outages ,
supply
Outdated data needed
add new records ,
change existing records , delete records no
longer
Invalidated data data validation
e , range , uniqueness ,
presence length type format , checks
, ,
logical
->
check sum ,
digit
->
parity
&"Firewall anti-malware
Vulnerability ->
malware ,




-> SQL & Data GUI components , limit website access to
injenction validation ,


the DB to execute SQL statements




Data warehousing -
combining data from a
variety of sources within an
organisation
->
analysis
:
purpose producing reports +




->
stores historical duta (not current infor

-> OLAP (OnLine Analytical Processing)


KDD -




Knowledge Discovery in Database
↳Data
mining a
set of
techniques for discovering hidden , valid ,
potentially useful patterns / trends

->
combines Al , database
machine learning , statistics ,
technology
->
5 transform t
Strategies extract , load data onth system
-




store-manage data
-




-
data access


the data
analyse
-




-
present data in a meaningful way




Big data massive volume of structured t unstructured data

->
sources
:
logs audit trails location-based data
social media
,
activity generated data , ,



->
purpose :
improve operations ,
data-driven innovation etc


- identifiers a volume (now much)


-
variety Chat kind)

->
velocity know
frequents
veracity
->
(now accurate)




SQL a programming language to perform CRUD operations on relational databases

NoSQL-non-relational databases : unstructured , flexible , store data in documents


MongoDB
->
e .


.
g



JSON is
file format that uses human-readable
language to store +
communicate data objects
-> for data
good storing temporary
->
structure :
objects enclosed in 23
name-value pairs separated by ,


:
name and value in a pair separated by

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