SEQUEL 2: A Unified Approach to Data Definition, Manipulation, and Control
IBM Journal of Research and DevelopmentPublished 1 November 1976
Donald D. Chamberlin, M. M. Astrahan, Kapali P. Eswaran, Patricia P. Griffiths, Raymond A. Lorie, J. W. Mehl
Citations521
Generate an AI Snapshot to get a quick, structured summary of this paper.
Study Snapshot
ObjectiveStudy objective
MethodsResearch methodology
PopulationPopulation studied
Sample sizeSample sizes
OutcomesStudy outcomes here
ResultsStudy results comes here
LimitationsResearch study limitations comes here
A concise AI-generated summary of the paper will appear here once you click Generate AI Snapshot.
TL;DR
SEQUEL 2 is a relational data language that provides a consistent, English keyword-oriented set of facilities for query, data definition, data manipulation, and datac ontrol.
Abstract
Sequel 2 is a relational data language that provides a consistent, English keyword-oriented set of facilities for query, data definition, data manipulation, and data control. Sequel 2 may be used either as a stand-alone interface for nonspecialists in data processing or as a data sublanguage embedded in a host programming language for use by application programmers and data base administrators. This paper describes SEQUEL 2 and the means by which it is coupled to a host language.
Keywords
Computer ScienceDecision Sciences
Communications of the ACMA relational model of data for large shared data banks
4,834 Citations1983E. F. Codd
ACM Transactions on Database SystemsSystem R
1,043 Citations1976M. M. Astrahan, Michael W. Blasgen +12 more
This paper contains a description of the overall architecture and design of the system, and emphasizes that System R is a vehicle for research in database architecture, and is not planned as a product.
SEQUEL
576 Citations1976Donald D. Chamberlin, Raymond F. Boyce
The data manipulation facility for a structured English query language (SEQUEL) which can be used for accessing data in an integrated relational data base.
Query by example
489 Citations1975Moshé M. Zloof
In the last few years the authors have witnessed a trend to appeal to the non-professional user who has little or virtually no computer or mathematical background, and this book aims to address that need.
ACM Transactions on Database SystemsAn authorization mechanism for a relational database system
401 Citations1976Patricia P. Griffiths, Bradford W. Wade
A multiuser database system must selectively permit users to share data, while retaining the ability to restrict data access, and an algorithm for detecting exactly which of B's grants should be revoked is presented.
Elsevier eBooksSystem R: Relational Approach to Database Management
214 Citations1989M. M. Astrahan, Michael W. Blasgen +12 more
Organization and maintenance of large ordered indices
199 Citations1970Raymond Bayer, Edward M. McCreight
The index organization described allows retrieval, insertion, and deletion of keys in time proportional to logk I where I is the size of the index and k is a device dependent natural number such that the performance of the scheme becomes near optimal.
INGRES
192 Citations1975Gerald Held, Michael Stonebraker +1 more
INGRES (Interactive Graphics and Retrieval System) is a relational data base and graphics system which is being implemented on a PDP-11/40 based hardware configuration at Berkeley.
IEEE Transactions on Software EngineeringUse of Psychological Experimentation as an Aid to Development of a Query Language
187 Citations1977Phyllis Reisner
This paper describes a series of psychological experiments used to test a new data base query language, aiming to make psychological testing of a language part of the design and development process.
Normalized data base structure
172 Citations1971E. F. Codd
This paper illustrates the removal of repeating groups, hierarchic and plex structures, and cross-referencing structures and the simplification of data base relations by normalization is discussed.
Views, authorization, and locking in a relational data base system
140 Citations1975Donald D. Chamberlin, Jim Gray +1 more
The examples in this paper will be drawn from a data base which describes a department store and consists of three relations: EMP, SAL, MGR, DEPT, and LOC.
Human factors evaluation of two data base query languages
101 Citations1975Phyllis Reisner, Raymond F. Boyce +1 more
Two data base query languages, SQUARE and SEQUEL, which are intended for use in an interactive mode by both programmers and professional non-programmers (e.g., accountants, lawyers, managers).
Communications of the ACMSpecifying queries as relational expressions
100 Citations1975Raymond F. Boyce, Donald D. Chamberlin +2 more
A data sublanguage called SQUARE, intended for use in ad hoc, interactive problem solving by non-computer specialists, and is shown to be relationally complete; however, it avoids the quantifiers and bound variables required by languages based on the relational calculus.
A multi-level relational system
28 Citations1975John Mylopoulos, S. A. Schuster +1 more
A relational data base is composed of a set of time varying relations inter-related through common domains.