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Thread: Accesing the result of SELECT query on multipile tables

  1. #1
    Join Date
    Jan 2006
    Location
    Israel
    Posts
    178

    Accesing the result of SELECT query on multipile tables

    Here is as an example of a query that my search form generates:
    PHP Code:
    SELECT uploads.titleuploads.dateCOUNT(downloads.ID) AS downloadsCOUNT(reviews.ID) AS reviewsSUM(reviews.rank) AS rankuploads.sizeusers.usernameusers.stars FROM uploads WHERE users.username LIKE '%oleg%' AND (uploads.title LIKE '%file%' OR uploads.description LIKE  '%file%') AND DATE_SUB(CURDATE(),INTERVAL 31 DAY) <= uploads.date AND uploads.size '100' and uploads.size <= '300' ORDER BY uploads.title ASCusers
    WHERE users
    .ID uploads.user_IDdownloads WHERE downloads.file_ID uploads.IDrank WHERE rank.file_ID uploads.ID 
    Let's i assume i ran this query and got some results, and the result idenifier is now '$result'.

    what would be the key of each field after i'll fetch an associated array out of those results?.

    I was thinking that it might be just the name of the field, just like in a simple query, but then, there are some fields with the same name in different tables,
    so far i didn't had to face this situation in praticular, but i'm sure that mysql
    is designed to avoid that situation at all costs.

    I also thought the results might be placed in a 2-dimmensional array, where the first key is the table name, and the second is the field name.
    for example:
    PHP Code:
    $arr['table']['field'
    Or perhaps the key is just like the filed name, as it appears in the query?
    for example:
    PHP Code:
    $arr['table.field'
    I searched the web for the answer, and sadly, i was unable to find anytihng to answer my question.

    I was hoping you can ******** that for me, guys.

    I can always use AS after every field i select, but that would be nusty.

    Also i'd like to order the results by the results of the query by the result of one of the SUM() or COUNT() functions. and i use the key i gave them with AS.

    example:
    SELECT uploads.name, COUNT(reviews.ID) AS reviews FROM reviews WHERE
    reviews.file_ID = uploads.ID, uploads WHERE uploads.size < 50 ORDER BY reviews
    Can i do this?

  2. #2
    Join Date
    Oct 2006
    Posts
    1,297
    I have never see a single SQL statement with multiple WHERE clauses.
    Are you sure that is valid? Are you trying to create a JOIN or a UNION?

  3. #3
    Join Date
    Jan 2006
    Location
    Israel
    Posts
    178
    Yes I'm trying to create a JOIN, as for UNION?, i don't know what it is.

    I read that "," is semantically similar to "JOIN" in MySQL, and since i never got to understanding INNER JOIN, I have no choice but using this method.

    I'd really appreciate a link to a decent online tutorial that explains the INNER JOIN function.

  4. #4
    Join Date
    Oct 2006
    Posts
    1,297
    OK, this:
    PHP Code:
    SELECT uploads.titleuploads.dateCOUNT(downloads.ID) AS downloadsCOUNT(reviews.ID) AS reviewsSUM(reviews.rank) AS rankuploads.sizeusers.usernameusers.stars
      FROM uploads
     WHERE users
    .username LIKE '%oleg%'
       
    AND (uploads.title LIKE '%file%' OR uploads.description LIKE  '%file%')
       AND 
    DATE_SUB(CURDATE(),INTERVAL 31 DAY) <= uploads.date
       
    AND uploads.size '100'
       
    AND uploads.size <= '300'
     
    ORDER BY uploads.title ASC,
     
    users WHERE users.ID uploads.user_ID,
     
    downloads WHERE downloads.file_ID uploads.ID,
     
    rank WHERE rank.file_ID uploads.ID 
    would become something more like this for an implicit JOIN:
    PHP Code:
    SELECT uploads.titleuploads.dateCOUNT(downloads.ID) AS downloadsCOUNT(reviews.ID) AS reviewsSUM(reviews.rank) AS rankuploads.sizeusers.usernameusers.stars
      FROM uploads
    usersdownloadsrank
     WHERE uploads
    .user_ID users.ID
       
    AND uploads.ID downloads.file_ID
       
    AND uploads.ID rank.file_ID
       
    AND users.username LIKE '%oleg%'
       
    AND (uploads.title LIKE '%file%' OR uploads.description LIKE  '%file%')
       AND 
    DATE_SUB(CURDATE(),INTERVAL 31 DAY) <= uploads.date
       
    AND uploads.size '100'
       
    AND uploads.size <= '300'
     
    ORDER BY uploads.title ASC
    and would become something more like this for an explicit JOIN:
    PHP Code:
    SELECT uploads.titleuploads.dateCOUNT(downloads.ID) AS downloadsCOUNT(reviews.ID) AS reviewsSUM(reviews.rank) AS rankuploads.sizeusers.usernameusers.stars
      FROM uploads
      JOIN users ON uploads
    .user_ID users.ID
      JOIN downloads ON uploads
    .ID downloads.file_ID
      JOIN rank ON uploads
    .ID rank.file_ID
     WHERE users
    .username LIKE '%oleg%'
       
    AND (uploads.title LIKE '%file%' OR uploads.description LIKE  '%file%')
       AND 
    DATE_SUB(CURDATE(),INTERVAL 31 DAY) <= uploads.date
       
    AND uploads.size '100'
       
    AND uploads.size <= '300'
     
    ORDER BY uploads.title ASC
    Last edited by so_is_this; 11-11-2006 at 01:24 PM.

  5. #5
    Join Date
    Jan 2006
    Location
    Israel
    Posts
    178
    I figured i'll be better learn to use the JOIN statement apporopreatly, so i did, and now i am using it, and it works

    nfgaming.net/public/site/upload/search.php

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