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Determine the Advanced modeling concepts
You have to follow some steps for object-oriented design.
These steps for OO Design methodology are as follow:
1) Produce object model
2) Produce dynamic model
3) Produce functional model
4) Define an algorithm for major operation
5) Package and Optimize.
What is conceptual model ? A conceptual model is a independent of both hardware and software.
Use Delegation to Share Implementation The delegation " Delegation comprises of catching an operation on one object and sending it to other object which is part, or related to
brief history,definition,current trends and future trends if any of data fragmentation
object oriented database
Find the names of all Albums that have more than 30 tracks. Result: (name: varchar(255))
To eliminate duplicate rows (distinct operator) Example: SELECT DISTINCT DEPTNO FROM EMP;
How external/conceptual mapping and conceptual /internal mapping is performed
Ancestry database records information about family trees . Following information is recorded about each person: FIRSTNAME first name SURNAME surname MNAME maiden name (if
Define Partial Key and Primary Key A partial key, also known as discriminator, is the set of attributes which can uniquely identify weak entities that are related to similar o
Explain the terms primary key, candidate key, alternate key and secondary key. In the given table identify every key? STUDENT(SID,Regno, Name, City) Primary Key: The prim
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