DataBase Query

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• Query language — Query languages are computer languages used to make queries into databases and information systems. Broadly, query languages can be classified according to whether they are database query languages or information retrieval query languages. The… …   Wikipedia

• Query by Example — (QBE) is a database query language for relational databases. It was devised by Moshè 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… …   Wikipedia

• query language — UK US noun [C] ► IT a way of getting particular information that you want from a large amount of information held on a computer database, spreadsheet, etc.: »HR managers need to be able to use a database query language to make graphs and… …   Financial and business terms

• Database management system — A database management system (DBMS) is a software package with computer programs that control the creation, maintenance, and the use of a database. It allows organizations to conveniently develop databases for various applications by database… …   Wikipedia

• query language —    In a database management system, a programming language that allows a user to extract and display specific information from a database.    Structured Query Language (SQL) is an international database query language that allows the user to… …   Dictionary of networking

• Query by humming — (QbH) is a music retrieval system that branches off the original classification systems of title, artist, composer, and genre. It normally applies to songs or other music with a distinct single theme or melody. The system involves taking a user… …   Wikipedia

• Query optimization — is a function of many relational database management systems in which multiple query plans for satisfying a query are examined and a good query plan is identified. This may or not be the absolute best strategy because there are many ways of doing …   Wikipedia

• Database theory — encapsulates a broad range of topics related to the study and research of the theoretical realm of databases and database management systems. Theoretical aspects of data management include, among other areas, the foundations of query languages,… …   Wikipedia

• Database design — is the process of producing a detailed data model of a database. This logical data model contains all the needed logical and physical design choices and physical storage parameters needed to generate a design in a Data Definition Language, which… …   Wikipedia

• Database administration and automation — Database administration is the function of managing and maintaining database management systems (DBMS) software. Mainstream DBMS software such as Oracle, IBM DB2 and Microsoft SQL Server need ongoing management. As such, corporations that use… …   Wikipedia

• Database tuning — describes a group of activities used to optimize and homogenize the performance of a database. It usually overlaps with query tuning, but refers to design of the database files, selection of the database management system (DBMS), operating system …   Wikipedia