Data means known facts, which can be recorded and implicit meaning. data is also a collection of facts and figures.
What is Information?
Information means processed or organized data.which can be drived from data and facts.
What is Data-Item (field)?
It is a character or group of characters that has a specific meaning.
For Example, cid, cname from customer table
What is record?
It is a collection of logically related fields.
And we also say that record consists of values for ech field.
What is file?
It is a collection related records.which arranged in a specific sequence.
What is metadata?
Set of data that describes and gives information about another data.
in other words, data about data is called metadate.
Example is given table below for metadata.
name
type
size
no
NUMBER
3
student name
VARCHAR2
20
What is System Catalog?
The system catalog is a collection of tables and views that contain important information about a database. A system catalog is available for each database.
What is data warehouse?
A data warehouse is a decision support database that is maintained separately from the organization's operational database.
What is data dictionary?
data dictionary is a file that contains metadata that is usually a part of the system catalog.
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