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We will explain here an example database application having COLLEGE database and use it in showing several E-R modelling concepts.
College database remains track of faculty, Students, Departments and Courses organised by several departments. Following is the explanation of COLLEGE database:
College have several departments like Department of Hindi, Department of English, and Department of Computer Science etc. Every department is assigned a unique id and name. Some faculty members are also appointed to each department and one of them works as head of the department (HOD).
There are several courses conducted by every department. Each course is assigned a unique id, name and duration.
With the linear commit protocol, sites are connected in a chain, and the subtransaction at the left-hand end of the chain initiates the protocol. Propose a crash recovery protocol
Using Relational Algebra which query finds customers, who have a balance of over 1000 ? Using Relational Algebra Π Customer_name( σ balance >1000(Deposit)) is query to find cu
triggering
Data Replication "If a relation R has its copies kept at two or more sites, then it is considered replicated". But why do we replicate a relation? There are several advan
What is Identity? Identity (or AutoNumber) is a column that automatically produces numeric values. A start and increment value can be set, but most DBA leave these at 1. A GUID
Consider the relations given below Borrower (id_no, name) Book (accno., title, author, borrower_idno) (a) Define the above relations as tables in SQL forming real world assumptio
1. Explain different addressing modes of 8086 Explanation of all addressing modes 2. Write a sequence of instructions to exchange two register contents using stack
create an er diagram for production management in film industry
Example: Consider the following relations: ROLLNO NAME ADDRESS COURSE_ID 100 Ka
Define deadlock avoidance. An alternative method for avoiding deadlocks is to needs additional information about how resources are to be requested. Each request requires the s
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