Computer W1 - Data, Information, and the Database Flashcards
facts and statistics collected together for reference or analysis
data
represents raw elements or unprocessed facts, including numbers and symbols to text and images
data
things known or assumed as facts, making the basis of reasoning or calculation
data
When collected and observed without interpretation, these elements remain simple and unorganized.
data
organized or classified data, which has some meaningful values for the receiver
information
processed data on which decisions and actions are based
information
data with meaning
information
collection of facts and statistics
without context
quantitative (numerical) or qualitative (descriptive)
data
numerical data
quantitative
descriptive data
qualitative
result of analyzing and interpreting data
has context used to help make decisions
information
collection of facts in a related subject
database
organized collection of structured information, or data, typically stored electronically in a computer system
database
HIERARCHY OF DATA IN A DATABASE
database
tables
records
fields
Why is there a need for a hierarchy in databases?
for better organization of the database and ease of use
6 problems in a database:
size of data
security
ease of updating
accuracy
redundancy
incomplete data
Databases are scalable and can accommodate large amounts of data.
size of data
Multiple people can edit the file at the same time and will not overwrite what others have added to the database.
ease of updating
There is validation during data entry. Each data entered inside the database are checked if correct or not.
accuracy
Databases provide ________ functions so that only authorized people can access the files.
security
Databases prevent multiple entries of data.
redundancy
There is no need to erase data that are “not important” in databases as they are expandable therefore no data will be loss.
incomplete data
