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Convert the following ER - diagram (Entity Relationship Diagram) into a relational database (the primary keys are underlined):
Ans: The relational database schema for the following ER diagram is like this:
A (a1, b1, a2, a3)
B (b1, b2, b3, b4)
C (c1, c2)
D (b1, c1, r21)
Process of implementing system design in dynamic models There are three essential approaches to implementing system design in dynamic models. These approaches are as below:
what is entity in database system?
What is the use of keyword ISA? The use of keyword ISA is to show that a class is a specialization of another class.
let us consider a table having 2200 records and the fixed size of the table to be considered as 25.then how many numbers of table is requredto perform horizontal fragmentation
What are the advantages of Logical Databases? It offers a simple-to-use selection screens. You can change the pre-generated selection screen to your needs. It offers check f
Consider the two relations given below Given that A is the primary key of R, D is the primary key of S and there is a referential integrity among S.A and R.A, discuss all
WHAT IS MEANT BY E-R MODEL
Attributes that are directly kept in the data base. For example, 'Birth date' attribute of a person. Derived Attributes that are not stored directly but can be derived
The aims of the project are: 1. To enable the students to undertake the detailed design of a specific plant or process 2. The design projects includes: process selection; und
what benefit can a company gain by managing its own infrasture and services
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