Introduced forty years ago, relational databases proved unusually succe- ful and durable. However, relational database systems were not designed for modern applications and computers. As a result, specialized database systems now proliferate trying to capture various pieces of the database market. Database research is pulled into di?erent directions, and speci- ized database conferences are created. Yet the current chaos in databases is likely only temporary because every technology, including databases, becomes standardized over time. The history of databases shows periods of chaos followed by periods of dominant technologies. For example, in the early days of computing, users stored their data in text ?les in any format and organization they wanted. These early days were followed by information retrieval systems, which required some structure for text documents, such as a title, authors, and a publisher. The information retrieval systems were followed by database systems, which addedeven more structure to the data and made querying easier. In the late 1990s, the emergence of the Internet brought a period of relative chaos and interest in unstructured and "semistructured data" as it wasenvisionedthateverywebpagewouldbelikeapageinabook.However, with the growing maturity of the Internet, the interest in structured data was regained because the most popular websites are, in fact, based on databases. The question is not whether future data stores need structure but what structure they need.

Pr�sentation de l'�diteur

###############################################################################################################################################################################################################################################################

Les informations fournies dans la section � A propos du livre � peuvent faire r�f�rence � une autre �dition de ce titre.

Description de la librairie

Visitez la page d�accueil du vendeur

Informations commerciales relatives au vendeur

Edward Bowditch Ltd
Exstowe, Exton, Exeter, EX3 0PP, United Kingdom

Conditions de vente et de livraison

Conditions g�n�rales de vente

Legal entity name: Edward Bowditch Ltd
Legal entity form: Limited company
Business correspondence address: Exstowe, Exton, Exeter, EX3 0PP
Company registration number: 04916632
VAT registration: GB834241546
Authorised representative: Mr. E. Bowditch

Droit de r�tractation

Conditions d'exp�dition

Orders usually dispatched within two working days.

Frais d?exp�dition de Royaume-Uni�vers�Etats-Unis

Frais d?exp�dition de Royaume-Uni�vers�Etats-Unis
Quantit� command�e	7 � 18 jours ouvr�s	2 � 5 jours ouvr�s
Premier article	EUR 28.80	EUR 28.80

Les d�lais de livraison sont fix�s par les vendeurs et varient en fonction du transporteur et du lieu. Les commandes transitant par les douanes peuvent �tre retard�es et les acheteurs sont responsables de tous les droits ou frais associ�s. Les vendeurs peuvent vous contacter au sujet de frais suppl�mentaires afin de couvrir toute augmentation des co�ts d'exp�dition de vos articles.