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Explain the disadvantages of using DBMS
There could be a few disadvantages of using DBMS.
As DBMS requires computers, we have to invest a good amount in acquiring the hardware, software, installation facilities and training of users.
We have to keep regular backups because a failure can happen any time. Taking backup is a lengthy process and the computer system cannot perform any other job at this time.
Whereas data security system is a boon for using DBMS, it must be very robust. If someone can bypass the security system then the database would become open to any type of mishandling
Let us now make the E-R diagram for the student database as per the explanation given in the previous section. We can also states the overall logical structure of a database usi
Explain the term High level DML? High level DML A high-level or non-procedural DML permit the user to specify what data is needed without specifying how it is to be acquired.
What is called remapping of bad sectors? If the controller detects that a sector is injured when the disk is initially formatted, or when an attempt is made to write the secto
Explain the steps for reduction of E-R model into relational model. Ans:(a) Entity set in E-R model will be considered as table name in relational Model. (b) Attributes of e
Hashed File Organisation Hashing is the most common form of purely random access to a database or file. It is also used to access columns that do not have an index as an optimi
Problem: You are given the following schema 1. Flights(flno, from, to, distance) 2. Aircraft(aid, flno, aname, cruisingRange) 3. Certified(eid, aid) 4. Employees(eid, ena
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Using SQL create a view RS for the relations R and S. The view consists of the columns A and D renamed as X and Y in that order. Insert a tuple into it. Show the contents of t
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