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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク SQL ： FOLDOC SQL /S Q L/ An industry-standard language for creating, updating and, querying relational database management systems. SQL was developed by IBM in the 1970s for use in System R. It is the de facto standard as well as being an ISO and ANSI standard. It is often embedded in general purpose programming languages. The first SQL standard, in 1986, provided basic language constructs for defining and manipulating tables of data; a revision in 1989 added language extensions for referential integrity and generalised {integrity} constraints. Another revision in 1992 provided facilities for {schema} manipulation and {data administration}, as well as substantial enhancements for data definition and data manipulation. Development is currently underway to enhance SQL into a computationally complete language for the definition and management of persistent, complex objects. This includes: generalisation and specialisation hi スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.