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Explain I command in QBE ?
I : It is the command in QBE that is used to insert tuple (s) into the database
Explain retrieval in QBE? Retrieval in QBE : A "GUI" for expressing queries. Based on the Domain Relational Calculus (DRC) Actually invented before GUIs. Very co
define attribute inheritance with example?
What is called query processing? Query processing refers to the range of activities included in extracting data from a database.
An important first step to the statistical analysis of data is to "get to know your data". The following tasks should contribute to this. (a) To the right of the dataset cons
Deadlock Prevention One of the easiest approaches for avoiding a deadlock would be to obtain all the locks at the begin of the transaction. Though, this approach restricts conc
composite attribute
FDs in Entities : Student entity : Enrolment number → Student name, Address Course Entity :
List the string operations supported by SQL? 1) Pattern matching Operation 2) Concatenation 3) Extracting character strings 4) Converting among uppercase and lower cas
Which two files are used during operation of the DBMS? Data dictionary and transaction log are two files used during operation of the DBMS.
Equi Join: A join in which the joining condition is based on equality among values in the common columns. Common columns show (redundantly) in the result table. Let us Consider th
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