A simplied universal relation assumption and its properties
ACM Transactions on Database Systems (TODS)
Maximal objects and the semantics of universal relation databases
ACM Transactions on Database Systems (TODS)
The theory of joins in relational databases
ACM Transactions on Database Systems (TODS)
The entity-relationship model—toward a unified view of data
ACM Transactions on Database Systems (TODS) - Special issue: papers from the international conference on very large data bases: September 22–24, 1975, Framingham, MA
The design and implementation of INGRES
ACM Transactions on Database Systems (TODS)
Decomposition—a strategy for query processing
ACM Transactions on Database Systems (TODS)
Synthesizing third normal form relations from functional dependencies
ACM Transactions on Database Systems (TODS)
On the Desirability of Acyclic Database Schemes
Journal of the ACM (JACM)
Principles of Database Systems
Principles of Database Systems
PODS '83 Proceedings of the 2nd ACM SIGACT-SIGMOD symposium on Principles of database systems
Assumptions in relational database theory
PODS '82 Proceedings of the 1st ACM SIGACT-SIGMOD symposium on Principles of database systems
Compatible attributes in a universal relation
PODS '82 Proceedings of the 1st ACM SIGACT-SIGMOD symposium on Principles of database systems
An algorithm for reducing acyclic hypergraphs
An algorithm for reducing acyclic hypergraphs
Resolving the query inference problem using Steiner trees
ACM Transactions on Database Systems (TODS)
On the properties and characterization of connection-trap-free schemes
PODS '86 Proceedings of the fifth ACM SIGACT-SIGMOD symposium on Principles of database systems
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)
Dynamic query interpretation in relational databases
PODS '87 Proceedings of the sixth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Update and retrieval in a relational database through a universal schema interface
ACM Transactions on Database Systems (TODS)
NFQL: the natural forms query language
ACM Transactions on Database Systems (TODS)
CSC '89 Proceedings of the 17th conference on ACM Annual Computer Science Conference
Explaining ambiguity in a formal query language
ACM Transactions on Database Systems (TODS)
Early Experience with the Visual Programmer's WorkBench
IEEE Transactions on Software Engineering
CALIN: a user interface based on a simple natural language
Proceedings of the 9th annual international ACM SIGIR conference on Research and development in information retrieval
Automated Query Formulation Using an Entity–Relationship Conceptual Schema
Journal of Intelligent Information Systems
Object management in POSTGRES using procedures
OODS '86 Proceedings on the 1986 international workshop on Object-oriented database systems
A high-level user interface for update and retrieval in relational databases—language aspects
SIGMOD '85 Proceedings of the 1985 ACM SIGMOD international conference on Management of data
An overview of the multidatabase system MRDSM
ACM '85 Proceedings of the 1985 ACM annual conference on The range of computing : mid-80's perspective: mid-80's perspective
U2RS: an upgradable universal relation system
CSC '88 Proceedings of the 1988 ACM sixteenth annual conference on Computer science
MAYBE algebra operators in database machine architecture
ACM '86 Proceedings of 1986 ACM Fall joint computer conference
A universal relation language interface for INGRES
CSC '91 Proceedings of the 19th annual conference on Computer Science
Data-driven understanding and refinement of schema mappings
SIGMOD '01 Proceedings of the 2001 ACM SIGMOD international conference on Management of data
FLEX: A Tolerant and Cooperative User Interface to Databases
IEEE Transactions on Knowledge and Data Engineering
A Relational Approach to Querying Data Streams
IEEE Transactions on Knowledge and Data Engineering
Mobile Computing and Databases-A Survey
IEEE Transactions on Knowledge and Data Engineering
Characterization of Well-Behaved Database Schemata and Their Update Semantics
VLDB '83 Proceedings of the 9th International Conference on Very Large Data Bases
Implementing Queries and Updates on Universal Scheme Interfaces
VLDB '88 Proceedings of the 14th 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
A survey of approaches to automatic schema matching
The VLDB Journal — The International Journal on Very Large Data Bases
LinearDB: a relational approach to make data warehouse scale like MapReduce
DASFAA'11 Proceedings of the 16th international conference on Database systems for advanced applications: Part II
Logical data independence reconsidered (extended abstract)
ISMIS'05 Proceedings of the 15th international conference on Foundations of Intelligent Systems
| Hi-index | 0.01 |
System/U is a universal relation database system under development at Standford University which uses the language C on UNIX. The system is intended to test the use of the universal view, in which the entire database is seen as one relation. This paper describes the theory behind System/U, in particular the theory of maximal objects and the connection between a set of attributes. We also describe the implementation of the DDL (Data Description Language) and the DML (Data Manipulation Language), and discuss in detail how the DDL finds maximal objects and how the DML determines the connection between the attributes that appear in a query.