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Define the concept of Object Diagram
An object diagram shows a set of the objects and their relationships with each other at a point of time. In a static view, object diagram is used to model interactions which consist of objects that collaborate without any message passed between them. It contains graphical contents, name, constraints, notes, packages and subsystems. The notation for objects and relationship among objects is shown as:
Figure: Relationship among objects
A buyer for a large department store chain must place orders with an athletic shoe manufacturer six months prior to the time the shoes will be sold in the department stores. In par
What are the advantages of embedded query language? Give an example of an embedded SQL query. Embedded query language - SQL could be implemented within two ways. It can be us
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What are the different integrity constraints in RDBMS? The various integrity constraints in RDBMS are as: Primary Key: primary key is a grouping of one or more attributes
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How can i turn a conceptual entity relationship diagram into a logical entity relationship diagram? what do i have to do with "mandetory or" and "optional or" relationships?
Consider the table student and list names of students in the departments other than maths and computer. SELECT std_name FRM student WHERE dept_name NOT IN (‘Maths','Computer);
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Write short notes on relational model The relational model uses a collection of tables to show both data and the relationships between those data. The relational model is an ex
What are the various states through which a transaction passes through in its lifetime? Briefly discuss all the events that causes transition from one state to another. Ans:
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