Extending the database relational model to capture more meaning
ACM Transactions on Database Systems (TODS)
System R: relational approach to database management
ACM Transactions on Database Systems (TODS)
The design and implementation of INGRES
ACM Transactions on Database Systems (TODS)
A statistician's view of the requirements of a database to support a central query language
SSDBM'81 Proceedings of the 1st LBL Workshop on Statistical database management
Data manipulation languages for statistical databases: the statistical analysis system (SAS)
SSDBM'81 Proceedings of the 1st LBL Workshop on Statistical database management
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A new Data Model based on a set theoretic approach is proposed here; it is intended to fit the statisticians requirements by giving them the ability to describe data in terms of classes of objects which are ordered according to users needs. Classes are identified by the handle which is a set of attributes; they are gathered in collections.Based on that Model a Statistical Data Manipulation Language (SDML) is presented to provide tools for Statistical Manipulations on Collections. Basic classes of operations are Retrieve, partition, internal or inter-object arithmetical operations and join of collections. The SDML has been designed to be concise, user-friendly and extensible.