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Describe Dynamic Model.
The dynamic model specifies allowable sequences of changes to the objects from an object model. It contains event trace diagrams describing scenarios. An event is the external stimulus from one object to other that occurs at a particular point of time. An event is one-way transmission of information from one object to other. A scenario is sequence of events which occurs during one particular execution of the system. Each fundamental execution of the system shall be represented as a scenario.
What is a Transaction? A transaction is an event which happens on the database. Generally a transaction reads a value from the database or writes a value to the database. If y
Given the following relations Vehicle (Reg_no, make, colour) Person(eno, name, address) Owner(eno, reg_no) Write expressions in the relational algebra to answer the following
I want to fragment existing table using java code... help me..!!
What are the advantages of by using an index and what are its disadvantages ? In difference, if the search key of a secondary index is not a candidate key, it is not sufficient
What is a homogeneous distributed database? In homogeneous distributed databases, all sites have the same database management system software, are aware of one another, and agr
What is meant by mean time to failure? The mean time to failure is the amount of time that the system could run continuously without failure.
The Database MySQL scripts cars_for_sale.sql and car_details.sql containing the data to use for this task have been supplied. To complete this task, you need to first create
Database Management Systems 1. Explain SQL Server 2000 Architecture with diagram. 2. Describe Second Normal and Third Normal Form. 3. Explain about query engine and stora
Implementation and SQL Applications
The primary key is selected from the
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