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What is meant by normalization of data?
It is a process of examining the given relation schemas based on their Functional Dependencies (FDs) and primary key to achieve the properties
Minimizing redundancy
Minimizing insertion
deletion and
updating anomalies.
write an SQL statement to create the database in MYSQL server
What is the used of specifying alias? Specifying alias: is used to rename column or attribute in a table.
What is a SELECT operation? The select operation selects tuples that please a given predicate. We use the lowercase letter σ to denote selection.
What are the three types of data sources used with ODBC? An ODBC file data source is a file that can be shared between database users. An ODBC system data source is one that is
What is disadvantage of multiple inheritances? There is potential ambiguity if the similar variable or method can be inherited from more than one superclass.eg: student class m
Association as a cache This association must be updated when any new element is added to it, but testing for overlap using association is more efficient. Figure:
The users who use easy-to-use menu are called ? The users who use easy to use menu are called as Naïve users.
Define Outer join Outer join - If there are any type of values in the one table that do not have corresponding value(s) in the other, in an equi-join which will not be selected
CAN SOMEONE HELP ME WITH ENTITY DIAGRAMS IN FIRST NORMAL FORM?
Construct a clean ans concise ER diagram for the database indicating the cardinality mapping for Employee management syatem
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