Query optimizationQuery optimization is a feature of many relational database management systems and other databases such as NoSQL and graph databases. The query optimizer attempts to determine the most efficient way to execute a given query by considering the possible query plans. Generally, the query optimizer cannot be accessed directly by users: once queries are submitted to the database server, and parsed by the parser, they are then passed to the query optimizer where optimization occurs.
Query by ExampleQuery by Example (QBE) is a database query language for relational databases. It was devised by Moshé M. Zloof at IBM Research during the mid-1970s, in parallel to the development of SQL. It is the first graphical query language, using visual tables where the user would enter commands, example elements and conditions. Many graphical front-ends for databases use the ideas from QBE today. Originally limited only for the purpose of retrieving data, QBE was later extended to allow other operations, such as inserts, deletes and updates, as well as creation of temporary tables.
Art of EuropeThe art of Europe, also known as Western art, encompasses the history of visual art in Europe. European prehistoric art started as mobile Upper Paleolithic rock and cave painting and petroglyph art and was characteristic of the period between the Paleolithic and the Iron Age. Written histories of European art often begin with the Aegean civilizations, dating from the 3rd millennium BC. However a consistent pattern of artistic development within Europe becomes clear only with Ancient Greek art, which was adopted and transformed by Rome and carried; with the Roman Empire, across much of Europe, North Africa and Western Asia.
Fine artIn European academic traditions, fine art is made primarily for aesthetics or creative expression, distinguishing it from decorative art or applied art, which also has to serve some practical function, such as pottery or most metalwork. In the aesthetic theories developed in the Italian Renaissance, the highest art was that which allowed the full expression and display of the artist's imagination, unrestricted by any of the practical considerations involved in, say, making and decorating a teapot.
Periods in Western art historyThis is a chronological list of periods in Western art history. An art period is a phase in the development of the work of an artist, groups of artists or art movement. Minoan art Ancient Greek art Roman art Medieval art Early Christian 260–525 Migration Period 300–900 Anglo-Saxon 400–1066 Visigothic 415–711 Pre-Romanesque 500–1000 Insular 600–1200 Viking 700–1100 Byzantine Merovingian Carolingian Ottonian Romanesque 1000–1200 Norman-Sicilian 1100–1200 Gothic 1100–1400 (International Gothic) Renaissance c.
Relational calculusThe relational calculus consists of two calculi, the tuple relational calculus and the domain relational calculus, that is part of the relational model for databases and provide a declarative way to specify database queries. The raison d'être of relational calculus is the formalization of query optimization, which is finding more efficient manners to execute the same query in a database.
Full-text searchIn text retrieval, full-text search refers to techniques for searching a single computer-stored document or a collection in a full-text database. Full-text search is distinguished from searches based on metadata or on parts of the original texts represented in databases (such as titles, abstracts, selected sections, or bibliographical references). In a full-text search, a search engine examines all of the words in every stored document as it tries to match search criteria (for example, text specified by a user).
Online analytical processingOnline analytical processing, or OLAP (ˈoʊlæp), is an approach to answer multi-dimensional analytical (MDA) queries swiftly in computing. OLAP is part of the broader category of business intelligence, which also encompasses relational databases, report writing and data mining. Typical applications of OLAP include business reporting for sales, marketing, management reporting, business process management (BPM), budgeting and forecasting, financial reporting and similar areas, with new applications emerging, such as agriculture.
Information artInformation art, which is also known as informatism or data art, is an emerging art form that is inspired by and principally incorporates data, computer science, information technology, artificial intelligence, and related data-driven fields. The information revolution has resulted in over-abundant data that are critical in a wide range of areas, from the Internet to healthcare systems.
Object databaseAn object database or object-oriented database is a database management system in which information is represented in the form of objects as used in object-oriented programming. Object databases are different from relational databases which are table-oriented. A third type, object–relational databases, is a hybrid of both approaches. Object databases have been considered since the early 1980s. Object-oriented database management systems (OODBMSs) also called ODBMS (Object Database Management System) combine database capabilities with object-oriented programming language capabilities.
