Chamberlin and Boyce: SEQUEL relational query language

What changed

Relational data could be queried through a structured, composable language accessible beyond formal calculus notation.

Scientific scope

The 1974 two-author SEQUEL paper; later SQL standards, commercial systems and independent database work excluded.

Evidence

The linked sources identify this contribution and its scope. WRS has not independently reconstructed the scientific claims. The target is the 1974 SEQUEL paper, an ancestor of SQL. Later SQL standards, implementations and contributions by other database researchers remain distinct.

Contributors

• Donald D. Chamberlin · SCIENCE: Named source author of the scoped work; individual effort shares are not measured.
• Raymond F. Boyce · SCIENCE: Named source author of the scoped work; individual effort shares are not measured.

• Chamberlin and Boyce, SEQUEL: A Structured English Query Language

Provisional WRS assessment, edition 2026-10-16.1. Independent expert calibration is pending. This grade does not certify correctness or assign ownership.

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