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Saving Derived Attributes to Avoid Re-computation
Data that is derived from other data should be stored in the computed form to avoid re-computation. For this, we could define new classes and objects and these derived classes must be updated if any of the base objects is changed.
sir we want er diagram of bank management system in this main menu option as new account,deposit amount,withdraw amount,all acount holder list,modify account,close account
List the requirements needed to design a trigger. The requirements are:- Specifying when a trigger is to be implemented. State the actions to be taken when the trigger im
To delete a particular column in a relation which command is used ? To delete a particular column in a relation ALTER command is used.
What are the requirements to ensure the objectives of file management principle is realized?
In this exercise you will create ten records, each containing the following fields: student name, class: Freshman, Sophomore, Junior or Senior, Major: Liberal Arts or General Sci
Give an example of operations from the State Actions and Activities. For instance, in bank the activity verify account code and verify password
Give Concurrent sub states diagram for the classroom and exam held. In Figure, simultaneous substrates have been taken. After passing Minor 1 test you could give Minor 2 test. T
Answer SQL Queries to extract data from data tables and questions on mapping conceptual data models into relational data model.
QUESTION (a) Consider a car database consisting of car model, car make, car origin, Engine capacity, color, cost.
Define instance and schema? Instance: Collection of data kept in the data base at a particular moment is known as an Instance of the database. Schema: The o
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