A relational model of data for large shared data banks
Communications of the ACM
SEQUEL: A structured English query language
SIGFIDET '74 Proceedings of the 1974 ACM SIGFIDET (now SIGMOD) workshop on Data description, access and control
Specifying queries as relational expressions
SIGPLAN '73 Proceedings of the 1973 meeting on Programming languages and information retrieval
Constructing queries from tokens
SIGMOD '86 Proceedings of the 1986 ACM SIGMOD international conference on Management of data
Answering queries on embedded-complete database schemes
Journal of the ACM (JACM)
Ad Hoc Query: a reusable database access capability
WADAS '94 Proceedings of the eleventh annual Washington Ada symposium & summer ACM SIGAda meeting on Ada
On the foundations of the universal relation model
ACM Transactions on Database Systems (TODS)
The theory of joins in relational databases
ACM Transactions on Database Systems (TODS)
Construction of relations in relational databases
ACM Transactions on Database Systems (TODS)
Query Optimization in Database Systems
ACM Computing Surveys (CSUR)
An algorithm for servicing multi-relational queries
SIGMOD '77 Proceedings of the 1977 ACM SIGMOD international conference on Management of data
SIGMOD '83 Proceedings of the 1983 ACM SIGMOD international conference on Management of data
Assumptions in relational database theory
PODS '82 Proceedings of the 1st ACM SIGACT-SIGMOD symposium on Principles of database systems
Optimal computation of total projections with unions of simple chase join expressions
SIGMOD '84 Proceedings of the 1984 ACM SIGMOD international conference on Management of data
High-Level Navigational Facilities for Network and Relational Databases
VLDB '83 Proceedings of the 9th International Conference on Very Large Data Bases
Universal Relation Views: A Pragmatic Approach
VLDB '83 Proceedings of the 9th International Conference on Very Large Data Bases
Generalized translation in a data base system
DAC '78 Proceedings of the 15th Design Automation Conference
Utilizing first-order logic in query processing
CSC '84 Proceedings of the ACM 12th annual computer science conference on SIGCSE symposium
IDA: an intelligent data access program
VLDB '77 Proceedings of the third international conference on Very large data bases - Volume 3
A sophisticate's introduction to database normalization theory
VLDB '78 Proceedings of the fourth international conference on Very Large Data Bases - Volume 4
The information preserving properties of relational database transformations
VLDB '78 Proceedings of the fourth international conference on Very Large Data Bases - Volume 4
Towards a universal relation interface
VLDB '79 Proceedings of the fifth international conference on Very Large Data Bases - Volume 5
QUIST: a system for semantic query optimization in relational databases
VLDB '81 Proceedings of the seventh international conference on Very Large Data Bases - Volume 7
Production program generation in a flexible data dictionary system
VLDB '80 Proceedings of the sixth international conference on Very Large Data Bases - Volume 6
An overview of recent data base research
ACM SIGMIS Database
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An Access Path Producing LanguagE (APPLE) has been developed which permits users to formulate completely non-procedural queries expressed solely in terms of attribute names. The responsibility for programming or specifying the access path by which a query is resolved has thus been shifted from the user to the system. Examples are presented which illustrate the procedures by which the system determines an access path. The problems to be found in this approach are also described, and techniques required to solve these problems are presented.