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Thread: SQL Interview question

  1. #1
    Junior Member
    Join Date
    Dec 2007
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    4

    SQL Interview question

    Hello,

    It is Interview Quetion,I am joing 5 tables,if query is too long,what i have to do,what are the other option?


  2. #2
    Junior Member
    Join Date
    Feb 2008
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    17

    Re: Interview question

    we can use subquerys...insted of using more joins....


  3. #3
    Junior Member
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    Feb 2008
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    17

    Re: Interview question

    Quote Originally Posted by nithya R View Post
    Hello,

    It is Interview Quetion,I am joing 5 tables,if query is too long,what i have to do,what are the other option?
    u can use subquerys .insted of joins....for better performance...


  4. #4
    Junior Member
    Join Date
    Feb 2008
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    2

    Re: Interview question

    Is this question in reference to LINQ or SQL Server?


  5. #5
    Moderator
    Join Date
    Jun 2007
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    2,074

    Re: SQL Interview question

    Try creating indexes.


  6. #6
    Junior Member
    Join Date
    Feb 2008
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    15

    Re: SQL Interview question

    Hi,
    If you know the structures of all tables You will be having more chances of doing this type of quires in different ways.
    for ex: If ur having related columns in each and every table use natural join( or self) (this will go better when the records were few, if the entities are huge it will take time to execute) ,
    or
    Group the entities according to their related columns and join them,
    if you are feeling tough doing all this you are having the only way that is using sub quires
    or
    creating Indexes to improve performance that will help you to use joins.
    bye sudheer


  7. #7
    Junior Member
    Join Date
    Feb 2008
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    1

    Re: SQL Interview question

    How to how many cursors are opened when we are running an oracle function or procedure?


  8. #8
    Junior Member
    Join Date
    Feb 2008
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    3

    Re: SQL Interview question

    How to write a function or procedure that verify the correct email id entered by the user??



    Last edited by admin; 03-07-2008 at 07:28 AM.

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