Implementment of computing logic based of database application
Jun Luo · Jisuanji gongcheng yu sheji · 2007
In the database application system,it exists a lot of relations among the data.Some of them are implemented by the mechanism of the database itself such as the referenced relation of the primary and foreign key,some of them is not implemented by database such as stock-sell-storage computing relation.At present,the relations which is not solved by database itself is implemented by codes what programmers write according to the users' request.But it is inconvenient to change and extend the computing relations.A good method which is convenient to maintain and implement the relations is necessary.