DATA
Every day you might see files ,images, words that looks random to you , but it's not random for other people who see it as data.
So what is data exactly?
It could be facts , numbers , symbols, images that are used to gather information from.
Data can be classified into two types like this:
Or it can be classified like this :
but where do we get data from or what are the sources of data?
We said before that we use data to get informations , so what are the differences between them:
Data are raw facts, building blocks for information (we can call it unprocessed information)
Informations are data processed to reveal meaning
Data are stored in Databases , but what is a database?
It is a large collection of related data,it models a real world organisation, and changes in the organisation =a change in database
Database allows us to :
Design- construction- manipulation of data
types of database along history:
Why not use flat file database instead of other database types?
Cause it has multiple drawbacks like:
Database designing steps
You ever heard about data mining? Watch this video:
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