Testing implications of data dependencies
ACM Transactions on Database Systems (TODS)
Multivalued dependencies and a new normal form for relational databases
ACM Transactions on Database Systems (TODS)
A relational model of data for large shared data banks
Communications of the ACM
The interaction between functional dependencies and template dependencies
SIGMOD '80 Proceedings of the 1980 ACM SIGMOD international conference on Management of data
Properties of acyclic database schemes
STOC '81 Proceedings of the thirteenth annual ACM symposium on Theory of computing
An introduction to the Programmer's Workbench
ICSE '76 Proceedings of the 2nd international conference on Software engineering
A relational data language with simplified binary relation handling capability
VLDB '77 Proceedings of the third international conference on Very large data bases - Volume 3
A consideration on normal form of not-necessarily-normalized relation in the relational data model
VLDB '77 Proceedings of the third international conference on Very large data bases - Volume 3
Constraints on null values in relational databases
VLDB '81 Proceedings of the seventh international conference on Very Large Data Bases - Volume 7
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A powerful database system can be developed by a combination of a central relational database system and intelligent terminals. In such an organization a typical function of a terminal is to offer high-level user interfaces. In this paper the concept of the database workbench is introduced and shown to be suitable for development by such terminals. As design problems usually require a large amount of interaction, typical functions of the workbench are (1) the design of database schemas, (2) the design of conversion procedures between real-world data and data in the system, and (3) the design of queries. For the first function we focus on the relational database design under the assumption that set values are permitted. Problems of set values, especially conversion problems of dependencies, are discussed. Various facilities for design conversion procedures and the design of queries are also discussed.