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Describe association design of an object by giving one suitable example of it.
The Design of Associations
Associations are "glue" of advanced object oriented analysis and design model. Association provides access paths among the objects. It is a type of conceptual entity which can be used for analysis and modeling of object. For example:
Figure: A simple form of Association
Creating views with check option : This option limits those updates of data values that cause records to go off the view. The following instance tells this in more detail: Examp
What is an index? An index is a structure that helps to place desired records of a relation quickly, without probing all records.
What is foreign key? A relation schema r1 derived from an ER schema may contain among its attributes the primary key of another relation schema r2.this attribute is known as a
What is DDL? Make a list of commands with short description used in DDL Ans: Data Definition Language that is abbreviated as DDL is a computer language for defining data struct
A video rental company has several branches. The data held on each branch is the branch address made up of street, city, state, and zip code, and the telephone number. Ea
Explain the functions of data manager? Functions of Data Manager : - Convert operations in user's queries coming directly through query processor or indirectly in an applicatio
Explain Record Based Logical Models? Record-Based logical Models: Also define data at the conceptual and view levels. Unlike object-oriented models, are used to state overall
Haw does it work one database application
A relationship set is a set of relationships of the similar type. For example, let consider the relationship among two entities sets course and student. Collection of all the in
please give me introduction to full data in D B M S in a short assignment
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