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In object oriented design, which steps must designer take to adjust inheritance?
To readjust inheritance following steps should be taken:
i) Rearrange and adjust the classes operations to increase the inheritance.
ii) Abstract ordinary behaviour out of sets of classes.
Construct a clean ans concise ER diagram for the database indicating the cardinality mapping for Employee management syatem
Submit SQL SELECT Statements to demonstrate several reports off your database, according to the following guidelines: You must submit at least 5 SELECT Statements. Each
can you please explain with the help of suitable example the difference between conflict equivalence and conflict serializability?
INSERT INTO command : Values can be inserted for all columns or for the selected columns Values can be given by sub query. In place of values parameter substitution
What is D command work in the respect of QBE? D: It is the command inside QBE to delete tuple(s) from the relation.
The participation Constraints shows whether the existence of an entity depends on its being associated to another entity by the relationship type. There are two kinds of participat
what is primary key
prototype of a distributed information system for a national car part retail outlet chain.
How many types of users works on database? Users are differentiated through the way they expect to interact along with the system (i) Application programmers-interact with
When every condition appears with equality condition (=) only. c) Natural join (denoted by R*S) When two join attributes have the similar name in both relations. (Tha
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