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What is the most significant feature that does not directly map into programming language structures? Why?
Association, since there are complex types of association, like as qualified associations and association classes that are very difficult to implement.
What are domain constraints? A domain is a set of values that might be assigned to an attribute .all values that appear in a column of a relation must be taken fro
What is transaction? Collections of operations that form a single logical unit of work are known as transactions.
Explain the Aggregation implies concurrency Concurrency actually is: This in objects can be identified by the way they change state. Present objects can change state independen
Project Description: I would like to get a database of a website which has clients email name and phone number. If you are able to get information from a website, by entering
How is concurrency identified? Concurrency in objects can be identified by the way they alter their state. Current objects can change their state independently. Aggregation imp
Define Fifth Normal form is concerned with Ans : Fifth Normal form is concerned with Join dependency.
Draw an ER diagram for company''s database schema
In E-R Diagram how derived attribute are represented ? In E-R Diagram By Dashed ellipse derived attribute are represented.
E-R model uses this symbol to represent weak entity set ? A Doubly outlined rectangle symbol is used to represent weak entity set.
Which language used in application programs to request data from the DBMS is referred? Language which is used in application program is DML to request data from the DBMS is ref
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