SERIE RESEARCH mEmORMIDn
نویسندگان
چکیده
The purpose of this article is to present a set of concepts to automate application maintenance which is necessary when structural changes in an implemented relational database occur. The kind of structural alterations in consideration are those that need no human interference with database structure and application program sources, and do not change the information contents of the database. These alterations only rearrange the description of the database tables and the way those tables are related to one another. The structural alteration process consists of the following three steps: implosion, Elementary Database Structure Operations (EDSOs) and explosion. Alteration of a database structure, however, requires changes in the DML used in application programs that make use of the database. This DML alteration process uses the same three steps mentioned above. The necessary information is obtained from an advanced data dictionary.
منابع مشابه
IfSf SERIE RESEARCH mEmORMIDn DYNAMIC SPATIAL INTERACTION MODELS: NEW DIRECTIONS
Spatial interaction models have received a great deal of attention in the past decade. In recent years, also various approaches have been developed to take into account dynamic aspects of spatial interaction models, for instance, by means of optimal control theory, bifurcation theory or catastrophe theory. The present paper deals with new directions in dynamic spatial interaction research. It w...
متن کاملSERIE RESEHRCH mEmORMIDn STOCHASTIC MARKET EQUILIBRIA WITH EFFICIËNT RATIONING
In this paper we study a housing market with fixed supplies and demands that have been derived on the basis of discrete choice models. We assume that prices are fixed by the government for policy reasons and that there is excess demand. The population is initially distributed in some exogenously given way over the housing stock and has to be redistributed in accord with its own desires. This ca...
متن کاملBiochemical Indices in Ecology: A Catalyst in Environmental Study
Volume 5 • Issue 1 • 1000239 Biochem Anal Biochem ISSN: 2161-1009 Biochem, an open access journal *Corresponding author: Marwa Muhammad Abu-Serie, Medical Biotechnology Department, Genetic Engineering and Biotechnology Research Institute, City for Scientific Research and Technology Applications (SRTA-City), New Borg El Arab, Alexandria, Egypt, Tel: +2034593422; Fax: +2034593407; E-mail: marwael...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2007