Data Hierarchy refers to the systematic organization of data, often in a hierarchical form. Data organization involves fields, records, files and so on.
A data field holds a single fact. Consider a date field, e.g. "September 19, 2004". This can be treated as a single date field (e.g. birth date), or 3 fields, namely, month, day of month and year.
A record is a collection of related fields. An Employee record may contain a name field(s), address fields, birth date field and so on.
A file is a collection of related records. If there are 100 employees, then each employee would have a record (e.g. called Employee Personal Details record) and the collection of 100 such records would constitute a file (in this case, called Employee Personal Details file).
Files are integrated into a database. This is done using a Database Management System. If there are other facets of employee data that we wish to capture, then other files such as Employee Training History file and Employee Work History file could be created as well.
The above is a view of data seen by a computer user.
The above structure can be seen in the hierarchical model, which is one way to organize data in a database.
In terms of data storage, data fields are made of bytes and these in turn are made up of bits.
A record is the largest unit of information in the data hierarchy. The smallest unit in the data hierarchy is called a data field.
a collection of integrated and related data.
dictionary
D smallest element in data hierarchy is FIELD.REASON: It (field) is d smallest bit of information found in a record.
define the data types
Cognitive hierarchy of information. Raw data is analyzed and processed to information which is used to make informed decisions.
bit-byte-field-record-file-data base
Storage is measured in a hierarchy of bytes.
Data modeling ETL process BI process
RAM
records, entities, fields, and databases.
Data hierarchy is the structure and organization of data, which involves fields, records, and files. (c) Bidgoly MIS2.