Usage of RDBMS

Hi Friends,

I was a little bit confused about RDBMS. Please help urgently.
EG :

Table 1 : Name, Age, Empid
Table 2 : DOB, ID, Salary

This is called RDBMS right as it is joining two tables having a common field ID/EmpId. Instead of having two tables why cannot we have only one table with all the fields in it. What is the necessity of creating a new table and connecting them using a primary key.In a single table also we can perform SQL query to get the results.

Please help urgently as i am having a seminar on coming tuesday

are you teaching this stuff?

http://en.wikipedia.org/wiki/Relational_model

Is this one to one relationship?

Quote:

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Originally Posted by PAVB

are you teaching this stuff?

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Yessssssssssssss. Thanks for your help

Quote:

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Originally Posted by lboard1982

Yessssssssssssss.

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No offence but, I'm wondering how can you sleep at night :rolleyes:

Those would normally be one table since they have a 1:1 relation. Also, 'Age' should not be stored as it is derived from DOB, otherwise you have to recalculate all the Age fields every day.

That was my question about, is it one to one relation, it seems to be but who knows....