relational database - Definition. Was ist relational database
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Was (wer) ist relational database - definition

DIGITAL DATABASE WHOSE ORGANIZATION IS BASED ON THE RELATIONAL MODEL OF DATA
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  • The general structure of a relational database

relational database         
¦ noun Computing a database structured to recognize relations between stored items.
relational database         
<database> (RDBMS - relational database management system) A database based on the relational model developed by E.F. Codd. A relational database allows the definition of data structures, storage and retrieval operations and integrity constraints. In such a database the data and relations between them are organised in tables. A table is a collection of rows or records and each row in a table contains the same fields. Certain fields may be designated as keys, which means that searches for specific values of that field will use indexing to speed them up. Where fields in two different tables take values from the same set, a join operation can be performed to select related records in the two tables by matching values in those fields. Often, but not always, the fields will have the same name in both tables. For example, an "orders" table might contain (customer_id, product_code) pairs and a "products" table might contain (product_code, price) pairs so to calculate a given customer's bill you would sum the prices of all products ordered by that customer by joining on the product-code fields of the two tables. This can be extended to joining multiple tables on multiple fields. Because these relationships are only specified at retreival time, relational databases are classed as dynamic database management system. The first commercial RDBMS was the {Multics Relational Data Store}, first sold in 1978. INGRES, Oracle, Sybase, Inc., Microsoft Access, and Microsoft SQL Server are well-known database products and companies. Others include PostgreSQL, SQL/DS, and RDB. ["Managing Data Bases, Four Critical Factors" Michael M. Gorman, QED Information Sciences, Inc.]. ["An Introduction To Database Systems" (6th ed) C. J. Date, Addison Wesley (an excellent source of detailed info)]. ["An End-User's Guide to Data Base" James Martin, Prentice Hall (excellent place to begin learning about DBMS)]. (2002-06-10)
Relational database         
A relational database is a (most commonly digital) database based on the relational model of data, as proposed by E. F.

Wikipedia

Relational database

A relational database is a (most commonly digital) database based on the relational model of data, as proposed by E. F. Codd in 1970. A system used to maintain relational databases is a relational database management system (RDBMS). Many relational database systems are equipped with the option of using SQL (Structured Query Language) for querying and updating the database.

Beispiele aus Textkorpus für relational database
1. That is why he decided to develop a relational database everyone said was impossible.
2. He knew he wanted to build a relational database company – in such a datatbase information is represented in tables – and to beat out IBM, Oracle‘s main competitor.