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Thread: Join query

  1. #1
    Join Date
    Nov 2012
    Posts
    1

    Join query

    Hi,

    Can anyone advice me on the following matter?

    I have a database which contains quite a number of tables. If I want to combine all the tables together, would it be possible?

    Thanks in advance for ur help & advice.

    Mei

  2. #2
    Join Date
    Jun 2003
    Location
    Ohio
    Posts
    12,569
    You want to denormalize the entire thing? Or are you just thinking of creating a "One True Lookup Table: (OTLT) or Enitity/Attribute/Value (EAV) design.
    None of these approaches is recommended.
    If it's not practically useful, then it's practically useless.

    blindman
    www.chess.com: "sqlblindman"
    www.LobsterShot.blogspot.com

  3. #3
    Join Date
    Apr 2002
    Location
    Toronto, Canada
    Posts
    20,002
    Quote Originally Posted by chinmei_18 View Post
    If I want to combine all the tables together, would it be possible?
    yes, but only if the tables hold similar data

    then you can do a UNION query on them
    rudy.ca | @rudydotca
    Buy my SitePoint book: Simply SQL

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