Data Retrieval
The relational database model introduced a programming language independent Structured Query Language (SQL), based on relational algebra.
The terms "data" and "information" are not synonymous. Anything stored is data, but it only becomes information when it is organised and presented meaningfully. Most of the world's digital data is unstructured, and stored in a variety of different physical formats even within a single organisation. Data warehouses began to be developed in the 1980s to integrate these disparate stores. They typically contain data extracted from various sources, including external sources such as the Internet, organised in such a way as to facilitate decision support systems (DSS).
Read more about this topic: Information Technology
Famous quotes containing the word data:
“To write it, it took three months; to conceive it three minutes; to collect the data in it—all my life.”
—F. Scott Fitzgerald (1896–1940)