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Develop Database academic assignment
Project Description:
For a provided set of instructions in a case study design Entity Relationship Diagram.
- Entity Relationship Diagram, Third Normal Form Relational Model.
- Relational Model and other associated questions. Since all information is given it's a simple one
Skills required are Database Administration, SQL
What is an entity relationship model? The entity relationship model is a collection of basic objects known as entities and relationship between those objects. An
Advantages of Data Distribution The primary benefit of distributed database systems is the ability to access and share data in a reliable and efficient manner.
Which operations need the participating relations to be union compatible? A UNION, INTERSECTION and DIFFERENCE operations need the participating relations to be union compatibl
Illustrate the statement 'Projection operation distributes over the union operation'. Give an example. Ans: Π L (E 1 ∪ E 2 ) = (Π L (E 1 )) ∪ (Π L (E 2 )) This says th
One-to-one relationship: For every 1:1 relationship type R in the ER diagram including two entities E1 and E2 we take one of entities (say E1) preferably with total participatio
Which method is used to key transformation ? A hash method is used to key transformation.
Explain hash file organization? Hash functions a) The distribution is uniform Hash functions assign each bucket the similar number of search -key values from the set of a
Which two files are used during operation of the DBMS? Data dictionary and transaction log are two files used during operation of the DBMS.
Discuss deferred update technique of recovery. What are the advantages? Ans: The deferred update methods do not physically update the database on disk till after a transact
What is the used of specifying alias? Specifying alias: is used to rename column or attribute in a table.
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