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Query languages are computer languages used to make queries into databases and information systems.

Broadly, query languages may be classified according to whether they are database query languages or information retrieval query languages.

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Query floodingQuery flooding is the protocol on which Gnutella operates. How it works When a user (let's call him Joe) gets onto a Gnutella network, his client creates a list of users to whom it considers itself directly connected. That is, it considers those users to	Query languageQuery languages are computer languages used to make queries into databases and information systems. Broadly, query languages may be classified according to whether they are database query languages or information retrieval query languages. Computer langua	QueryIn general, a query is a form of questioning, in a line of inquiry. In computing, a database query is often specified using the structured query language SQL. Computer terminology Data management.
Query by ExampleQuery by Example (QBE) is a method of creating database queries using examples based on a text string, the name of a document or a list of documents. The QBE system converts the user input into a formal database query. This approach allows the user to per	Query stringA query string is the part of a URL that conveys parametric data to the server. Syntax The basic syntax is ?parameter value¶meter value. The query string starts with a question mark. Then follows a series of parameter value pairs. For example, Message	Query by hummingQuery by humming QBH is a music retrieval system that branches off the original classification systems of title, artist, composer, and genre. The system involves taking a user-hummed melody (input query) and comparing it to an existing database. The syste