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008			220601s2012 sz | o |||| 0|eng d
020			_a9783031018930
024	7		_a10.1007/978-3-031-01893-0 _2doi
040			_aES-MaUEC _bspa _cES-MaUEC _dES-MaUEC
050		4	_aQA76.9.D3 _b2012 EB
100	1		_aGreco, Sergio _eautor _4aut _4http://id.loc.gov/vocabulary/relators/aut _9686321
245	1	0	_aIncomplete Data and Data Dependencies in Relational Databases _cby Sergio Greco, Cristian Molinaro, Francesca Spezzano
250			_a1st edition 2012
264		1	_aCham _bSpringer International Publishing _c2012
300			_a1 recurso en línea (XI, 111 páginas)
336			_atexto _btxt _2rdacontent
337			_aelectrónico _bc _2rdamedia
338			_arecurso electrónico _bcr _2rdacarrier
347			_aarchivo de texto _bPDF
490	0		_aSynthesis Lectures on Data Management _x2153-5426
505	0		_aIntroduction -- Relational Databases -- Incomplete Databases -- The Chase Algorithm -- Chase Termination -- Data Dependencies and Normal Forms -- Universal Repairs -- Chase and Database Applications.
520			_aThe chase has long been used as a central tool to analyze dependencies and their effect on queries. It has been applied to different relevant problems in database theory such as query optimization, query containment and equivalence, dependency implication, and database schema design. Recent years have seen a renewed interest in the chase as an important tool in several database applications, such as data exchange and integration, query answering in incomplete data, and many others. It is well known that the chase algorithm might be non-terminating and thus, in order for it to find practical applicability, it is crucial to identify cases where its termination is guaranteed. Another important aspect to consider when dealing with the chase is that it can introduce null values into the database, thereby leading to incomplete data. Thus, in several scenarios where the chase is used the problem of dealing with data dependencies and incomplete data arises. This book discusses fundamental issues concerning data dependencies and incomplete data with a particular focus on the chase and its applications in different database areas. We report recent results about the crucial issue of identifying conditions that guarantee the chase termination. Different database applications where the chase is a central tool are discussed with particular attention devoted to query answering in the presence of data dependencies and database schema design. Table of Contents: Introduction / Relational Databases / Incomplete Databases / The Chase Algorithm / Chase Termination / Data Dependencies and Normal Forms / Universal Repairs / Chase and Database Applications.
988			_aSynthesis Collection of Technology_2012
650		7	_2embne _9150569 _aSistemas de gestión de bases de datos
700	1		_aMolinaro, Cristian _eautor _4aut _4http://id.loc.gov/vocabulary/relators/aut _9686322
700	1		_aSpezzano, Francesca _eautor _4aut _4http://id.loc.gov/vocabulary/relators/aut _9686323
776	0	8	_iPrinted edition: _z9783031007651
776	0	8	_iPrinted edition: _z9783031030215
856	4	0	_uhttps://go.openathens.net/redirector/universidadeuropea.es?url=https://doi.org/10.1007/978-3-031-01893-0 _zAcceso a este recurso digital (usuarios Universidad Europea de Madrid)
942			_2lcc _cLE
998			_b01/2023 _dz _eb _zSI