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IBM IS1
IS/1 was the world's first relational database system, implemented at the IBM United Kingdom Scientific Centre in Peterlee in the years 1970–1972.Notley, M, "Peterlee IS/1 System", UKSC Report 18, 1972 It had limited facilities but implemented a true relational model. It was the precursor to PRTV PRTV (''Peterlee Relational Test Vehicle'') was the world's first relational database management system that could handle significant data volumes. It was a relational query system with powerful query facilities, but very limited update facility a .... References IS1 Relational database management systems {{database-software-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 the SQL (Structured Query Language) for querying and maintaining the database. History The term "relational database" was first defined by E. F. Codd at IBM in 1970. Codd introduced the term in his research paper "A Relational Model of Data for Large Shared Data Banks". In this paper and later papers, he defined what he meant by "relational". One well-known definition of what constitutes a relational database system is composed of Codd's 12 rules. However, no commercial implementations of the relational model conform to all of Codd's rules, so the term has gradually come to describe a broader class of database systems, which at a minimum: # Present the data to the user as relati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United Kingdom
The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and Northern Ireland. The United Kingdom includes the island of Great Britain, the north-eastern part of the island of Ireland, and many smaller islands within the British Isles. Northern Ireland shares a land border with the Republic of Ireland; otherwise, the United Kingdom is surrounded by the Atlantic Ocean, the North Sea, the English Channel, the Celtic Sea and the Irish Sea. The total area of the United Kingdom is , with an estimated 2020 population of more than 67 million people. The United Kingdom has evolved from a series of annexations, unions and separations of constituent countries over several hundred years. The Treaty of Union between the Kingdom of England (which included Wales, annexed in 1542) and the Kingdom of Scotland in 170 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peterlee
Peterlee is a town in County Durham, England. It lies between Sunderland to the north, Hartlepool to the south, the Durham Coast to the east and Durham to the west. It gained town status in 1948 under the New Towns Act 1946. The act also created the nearby settlement of Newton Aycliffe and later Washington, Tyne and Wear. History The case for founding Peterlee as a new town was put forward in ''Farewell Squalor'' by Easington Rural District Council Surveyor C. W. Clarke, who also proposed that the town be named after the celebrated Durham miners' leader Peter Lee. It is one of the few places in the British Isles to be directly named after a recent individual, and unique among the post-Second World War new towns in having its existence requested by local people through their MP. A deputation, mostly if not wholly consisting of working miners, met the Minister of Town and Country Planning to put the case for a new town in the district. The Minister, Lewis Silkin, responded by o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PRTV
PRTV (''Peterlee Relational Test Vehicle'') was the world's first relational database management system that could handle significant data volumes. It was a relational query system with powerful query facilities, but very limited update facility and no simultaneous multiuser facility. PRTV was a successor from the very first relational implementation, IS1. Features PRTV included several firsts in the relational database area: * implemented relational optimizer * implemented cost-based relational optimizer * handle tables of 1,000 rows up to 10,000,000 rows * user-defined functions (UDFs) within an RDB (also a large suite of built-in functions such as trigonometric and statistical) * geographic information system based on an RDB (using UDFs such as point-in-polygon). PRTV was based on a relational algebra, Information Systems Base Language (ISBL) and followed the relational model very strictly. Even features such as user-defined functions were formalized within that model. The P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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