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Object-based Models: Use objects as key data representation components . Examples:- Entity-Relationship Model: It is a collection of real world objects known as entitie
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
is Chipo carrying his baby
Explain the Exec statement in SQL Ans: Exec statement has the structure EXEC SQL END-EXEC Embeded SQl statements are of a form identical to non embedded SQL statem
What are multiple inheritances? Multiple inheritances allow a class to inherit variables and methods from many super classes.
what are the limitations of dbms?
In an E-R diagram how attributes are represented ? In an E-R diagram attributes are represented in a ellipse.
File Organisation In Dbms Introduction Databases are used to store information. Usually, the principal operations we have to perform on database are those relating to:
QUESTION (a) Consider a car database consisting of car model, car make, car origin, Engine capacity, color, cost.
Exclusive lock It is asked for by a transaction on a data item that it wants to update. No other transaction can put either a shared lock or an exclusive lock on a dat
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