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Titlebook: Standard Relational and Network Database Languages; E. J. Yannakoudakis,C. P. Cheng Book 1988 Springer-Verlag Berlin Heidelberg 1988 Data

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书目名称Standard Relational and Network Database Languages
编辑E. J. Yannakoudakis,C. P. Cheng
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图书封面Titlebook: Standard Relational and Network Database Languages;  E. J. Yannakoudakis,C. P. Cheng Book 1988 Springer-Verlag Berlin Heidelberg 1988 Data
描述For any type of software to become standard, whether a third genera­ tion language or an integrated project support environment (IPSE), it must undergo a series of modifications and updates which are a direct result of theoretical and empirical knowledge gained in the process. The database approach to the design of general purpose infonn­ ation systems has undergone a series of revisions during the last twenty years which have established it as a winner in many different spheres of infonnation processing, including expert systems and real­ time control. It is now widely recognised by academics and practitioners alike, that the use of a database management system (DBMS) as the under­ lying software tool for the development of infonnation/knowledge based systems can lead to environments which are: (a) flexible, (b) efficient, (c) user-friendly, (d) free from duplication, and (e) fully controllable. The concept of a DBMS is now mature and has produced the software necessary to design theactual database holding the data. The database languages proposed recently by the International Organisa­ tion for Standardisation (ISO) are thorough enough for the design of the necessary software com
出版日期Book 1988
关键词Data Manipulation Language; SQL; classification; database; database management; language; management; netwo
版次1
doihttps://doi.org/10.1007/978-1-4471-3287-5
isbn_softcover978-1-4471-3289-9
isbn_ebook978-1-4471-3287-5
copyrightSpringer-Verlag Berlin Heidelberg 1988
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Module Language in SQL application program during its execution and an application program must be associated with at most one module. During execution, a program can call procedures in a module (each of which consists of an SQL statement) to perform assigned tasks.
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Schema Definition in NDLDL-DDL) is used to specify a schema which consists of record type definitions and set type definitions. The language performs similar tasks to those discussed under the SQL-DDL, with the exception that the NDL-DDL defines tree structures instead of simple relational tables.
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Data Manipulation in NDLtains NDL statements which are executed when the procedure is called by the application program associated with the module. NDL is, of course, interfaced to ordinary high-level programming languages (e.g FORTRAN, Pascal) and allows further analyses and manipulation of data item values.
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Database Management SystemsComputer-based information systems which make use of a database management system (DBMS) evolve around the concepts of field, aggregate fields, record type, and file.
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