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Briefly explain each of the following database terms. Use no more than 2-3 lines for each term.
1. DBMS
2. Update Anomaly
3. Alias (referring to tables in SQL queries)
4. DDL
5. Domian
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
Scenario: You are a freelance database designer who has just been contacted by a small software development company named Altair Software. The president of the company has asked
How many levels can be viewed in Architecture of the database ? Architecture of the database can be viewed as three levels.
How is the database organised in Oracle? Database organized within Oracle in terms of table and table holds attributes and values. A database consists of one or more logical
What are data models? Explain it detail? Entity relationship model Rectangles Ellipse Diamonds Lines Relational model Relational model use a collection
Write short note on Events Events consist of inputs, interrupts, decisions and actions performed by any external device or users. Every event always has a sender and receiver.
Describe relational model? Structure of relational data base Basic structure Database schema Keys Schema diagram Query languages
Give an example of Operations from the functions of a bank. For creation of a saving account, you can write: bank::: create -savings-account (customer)->account. For oper
Lossless-Join Decomposition Let us show an intuitive decomposition of a relation. We require a better basis for deciding decompositions since intuition may not always be r
Explain I command in QBE ? I : It is the command in QBE that is used to insert tuple (s) into the database
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