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How to design a formal and exact model
How to design a formal and exact model of real-world problems by applying findings of analysis phase of OMT. The object design phase find out the complete definition of classes and associations used in implementation. The advanced object design is a method to create architecture of real world problems. The advanced object design is similar to the preliminarily design phase of traditional software development cycle
explain thee diffrent types of data models
Consider a systems development project with the following data Activity Duration (weeks) Precedence Relationship 1. Software design
How can you terminate the MySQL Server? Typing the following in Command prompt will shut down the server completely as root user % mysqladmin -u root -p shutdown
Eliminate Repeating Groups The problem is, "Find out the list of employees, who knows DB2". For this problem we require to perform an awkward scan of the list looking for re
Draw an entity relationship diagram (ERD) for the following situation: A company has a number of employees. Each employee is identified by an Employee_Id. The company wants to st
A database is a set of data. But, is the data kept in a database trustworthy? To answer that query we must first answer the question. What is integrity? Integrity simply means t
Explain Dynamic Two-Phase Locking Here a transaction locks a data item instantly earlier than any operation is applied on the data item. After finishing all the operations on
WHERE and HAVING clause in SQL ? The WHERE clause is commonly used for implementing conditions on each tuple of the relation. The HAVING clause is used in combination along wi
in case of functional dependencies how we get the higher normal form.
The participation Constraints shows whether the existence of an entity depends on its being associated to another entity by the relationship type. There are two kinds of participat
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