Logic, algebra and databases
The temporal query language TQuel
ACM Transactions on Database Systems (TODS)
Extending relational algebra to manipulate temporal data
Information Systems
A recursive algebra for nested relations
Information Systems
On completeness of historical relational query languages
ACM Transactions on Database Systems (TODS)
Joining nested relations and subrelations
Information Systems
The TSQL2 Temporal Query Language
The TSQL2 Temporal Query Language
Temporal Relational Data Model
IEEE Transactions on Knowledge and Data Engineering
SQL Extension for Interval Data
IEEE Transactions on Knowledge and Data Engineering
Algebraic Identities and Query Optimization in a Parametric Model for Relational Temporal Databases
IEEE Transactions on Knowledge and Data Engineering
IEEE Transactions on Knowledge and Data Engineering
An Introduction to Database Systems
An Introduction to Database Systems
Joining interval data in relational databases
SIGMOD '04 Proceedings of the 2004 ACM SIGMOD international conference on Management of data
Join operations in temporal databases
The VLDB Journal — The International Journal on Very Large Data Bases
Data & Knowledge Engineering
Modeling temporal dimensions of semistructured data
Journal of Intelligent Information Systems
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The algebra (TNA) of a generalised temporal database model supporting temporal relations nested to any finite depth is presented. The temporal nested relations consist of temporal nested attributes which are formed from temporal attributes together with the corresponding time-varying attributes. Therefore, the temporal dimension of the model is nested and is not integral with the corresponding time-dependent value. All the operations of the algebra are defined recursively and are proved to be closed. In particular, considering the natural join operation for temporal nested relations, different cases are presented, distinguished by the types and the nesting levels of the common attributes that participate in the natural join operation.