Results 11 to 20 of about 16,056 (155)
A multi-set extended relational algebra: a formal approach to a practical issue [PDF]
, 1993 The relational data model is based on sets of tuples, i.e. it does not allow duplicate tuples an a relation. Many database languages and systems do require multi-set semantics though, either because of functional requirements or because of the high costs
de By, R.A. +2 more
core +14 more sources
Effectiveness of In‐Person Versus Online Negotiation Teaching for Practitioners
Negotiation Journal, EarlyView., 2023 Most negotiation courses have been taught in person. However, online education has become more prevalent over the past decade due to its flexibility, cost and time efficiency, and new digital technologies designed to compensate for the lack of personal contact.
Patricia Oehlschläger, Michael A. Merz
wiley +1 more source
Differential Privacy for Relational Algebra: Improving the Sensitivity Bounds via Constraint Systems [PDF]
, 2012 Differential privacy is a modern approach in privacy-preserving data analysis to control the amount of information that can be inferred about an individual by querying a database.
Apt +15 more
core +6 more sources
Joining Extractions of Regular Expressions [PDF]
, 2017 Regular expressions with capture variables, also known as "regex formulas," extract relations of spans (interval positions) from text. These relations can be further manipulated via Relational Algebra as studied in the context of document spanners, Fagin
Freydenberger, Dominik D. +2 more
core +2 more sources
When Can Matrix Query Languages Discern Matrices? [PDF]
, 2020 We investigate when two graphs, represented by their adjacency matrices, can be distinguished by means of sentences formed in MATLANG, a matrix query language which supports a number of elementary linear algebra operators.
Geerts, Floris
core +1 more source
On tractability and congruence distributivity [PDF]
, 2007 Constraint languages that arise from finite algebras have recently been the object of study, especially in connection with the Dichotomy Conjecture of Feder and Vardi.
Emil Kiss, Matt Valeriote, Neil Immerman
core +4 more sources
, 2012 Data stream management systems (DSMS) so far focus on event queries and hardly consider combined queries to both data from event streams and from a database.
Brodt, Simon, Bry, François
core +4 more sources
Polystore mathematics of relational algebra [PDF]
, 2017 Financial transactions, internet search, and data analysis are all placing increasing demands on databases. SQL, NoSQL, and NewSQL databases have been developed to meet these demands and each offers unique benefits.
Gadepally, Vijay +5 more
core +3 more sources
Manipulation of expressions in a relational algebra [PDF]
, 1979 This paper describes a syntax for expressions based on the relational algebra. A tree representation is generated when an expression is analyzed. Transformations on the tree representations of expressions are applied in order to obtain improvements with ...
Engmann, R., Stroet, J.W.M.
core +3 more sources
Computing Multi-Relational Sufficient Statistics for Large Databases [PDF]
, 2014 Databases contain information about which relationships do and do not hold among entities. To make this information accessible for statistical analysis requires computing sufficient statistics that combine information from different database tables. Such
Qian, Zhensong +2 more
core +1 more source