1981 · Databases
The relational model separated a query’s meaning from physical storage.
Visual guide
Represent facts in relations.
State the result you want.
Let the system choose an access method.
The relational model helped databases become flexible shared infrastructure, with powerful declarative query languages.
A table on a screen is not the whole relational model; keys, relationships and formal operations matter.
01 · The idea
Edgar Codd proposed representing data as relations, commonly understood as tables. Queries could describe the information wanted rather than prescribe a path through stored records. A database system could choose how to carry out that request while preserving a precise logical meaning.
The relational model helped databases become flexible shared infrastructure, with powerful declarative query languages.
02 · The people
Edgar Codd transformed database design by proposing the relational model. Working at IBM, he described information through relations rather than requiring applications to navigate physical record links. This separation allowed users to ask for data without prescribing exactly how it should be retrieved. His mathematical framework supported relational query languages and helped make database systems more flexible, understandable, and independent of storage details.
Read the biography ↗03 · Read further
Original explanations based on the official award record. The subject label is an editorial navigation aid.
Database engines can be redesigned around the questions and data they serve.
The story
Databases must preserve meaningful changes even when computers crash.
The story