Usage of RDBMS
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  1. #1
    Join Date
    Jul 2007
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    2

    Thumbs up 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

  2. #2
    Join Date
    Mar 2007
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    Ft. Lauderdale, FL
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    are you teaching this stuff?
    Pablo (Paul) Berzukov

    Author of Understanding Database Administration available at amazon and other bookstores.

    Disclaimer: Advice is provided to the best of my knowledge but no implicit or explicit warranties are provided. Since the advisor explicitly encourages testing any and all suggestions on a test non-production environment advisor should not held liable or responsible for any actions taken based on the given advice.

  3. #3
    Join Date
    Jul 2007
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    Quote Originally Posted by PAVB
    are you teaching this stuff?

    Yessssssssssssss. Thanks for your help

  4. #4
    Join Date
    Mar 2007
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    Quote Originally Posted by lboard1982
    Yessssssssssssss.
    No offence but, I'm wondering how can you sleep at night
    Pablo (Paul) Berzukov

    Author of Understanding Database Administration available at amazon and other bookstores.

    Disclaimer: Advice is provided to the best of my knowledge but no implicit or explicit warranties are provided. Since the advisor explicitly encourages testing any and all suggestions on a test non-production environment advisor should not held liable or responsible for any actions taken based on the given advice.

  5. #5
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    David Aldridge,
    "The Oracle Sponge"

    Senior Manager, Business Intelligence Development
    XM Satellite Radio
    Washington, DC

    Oracle ACE

  6. #6
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    Nov 2006
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    Sofia
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    Is this one to one relationship?

  7. #7
    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.

  8. #8
    Join Date
    Nov 2006
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    That was my question about, is it one to one relation, it seems to be but who knows....

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