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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.
Explain DML with some examples? DML - Data Manipulation Language: statements used for managing data within schema objects. Some examples: • SELECT - retrieve data from the a da
give some example real-life situations where DBMS are most suiitabe
It is mandatory that for every table in the LDB hierarchy there should exist one GET statement in the report. False. It is not essential.
Define single valued and multivalued attributes. Single valued attributes: attributes with a single value for a particular entity are known as single valued attributes. Mult
Gyan Gurukul is a software company that provides software related solution. Ashutosh Dubey who is the director of Gyan Gurukul want a three-level schema architecture for the Gyan G
Find the names of all Albums that have more than 30 tracks. Result: (name: varchar(255))
Differance between procedural and non procedural DML? Procedural and non procedural DML Procedural DML exactly what data is require and how to obtain those data. Non procedural
Explain Candidate Key and Super Key A super key is a set of one or more than attributes that, taken collectively, permits us to identify uniquely a tuple in the relation. Wher
What are called index-sequential files? The files that are ordered sequentially with a primary index on the search key are known as index-sequential files
What is meant by computing the closure of a set of functional dependency? The closure of F denoted by F + is the set of functional dependencies logically implied by F.
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