How to compare two fields, from 2 tables in 2 different databases ?

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  • alter.fire

    How to compare two fields, from 2 tables in 2 different databases ?

    Hey im trying to do the following in PHP:

    Connect to 2 different databases, one named complete and one
    incomplete.

    My goal is to find whats missing in the "incomplete " database.

    The fields i want to compare in the database/table is named 'name' in
    both. This field is comtaining unique names

    How would you guys do that? arr1 vs arr2 compare or maybe some left
    join sql?
    I want to output the diff to screen.

    Anyone can show me a sample, to get me in the right direction?

    Thanks in advance
    Jan
  • Mike Lahey

    #2
    Re: How to compare two fields, from 2 tables in 2 different databases?

    alter.fire wrote:
    Hey im trying to do the following in PHP:
    >
    Connect to 2 different databases, one named complete and one
    incomplete.
    >
    My goal is to find whats missing in the "incomplete " database.
    >
    The fields i want to compare in the database/table is named 'name' in
    both. This field is comtaining unique names
    >
    How would you guys do that? arr1 vs arr2 compare or maybe some left
    join sql?
    I want to output the diff to screen.
    >
    Anyone can show me a sample, to get me in the right direction?
    >
    Thanks in advance
    Jan
    Not too hard to do in php... Make 2 arrays with the names and array_diff
    them.

    Comment

    • iTech7.com

      #3
      Re: How to compare two fields, from 2 tables in 2 different databases?

      On May 12, 6:26 am, Mike Lahey <mikey6...@yaho o.comwrote:
      alter.fire wrote:
      Hey im trying to do the following in PHP:
      >
      Connect to 2 different databases, one named complete and one
      incomplete.
      >
      My goal is to find whats missing in the "incomplete " database.
      >
      The fields i want to compare in the database/table is named 'name' in
      both. This field is comtaining unique names
      >
      How would you guys do that? arr1 vs arr2 compare or maybe some left
      join sql?
      I want to output the diff to screen.
      >
      Anyone can show me a sample, to get me in the right direction?
      >
      Thanks in advance
      Jan
      >
      Not too hard to do in php... Make 2 arrays with the names and array_diff
      them.
      I don't think it displays a nice difference ?

      Comment

      • Jerry Stuckle

        #4
        Re: How to compare two fields, from 2 tables in 2 different databases?

        alter.fire wrote:
        Hey im trying to do the following in PHP:
        >
        Connect to 2 different databases, one named complete and one
        incomplete.
        >
        My goal is to find whats missing in the "incomplete " database.
        >
        The fields i want to compare in the database/table is named 'name' in
        both. This field is comtaining unique names
        >
        How would you guys do that? arr1 vs arr2 compare or maybe some left
        join sql?
        I want to output the diff to screen.
        >
        Anyone can show me a sample, to get me in the right direction?
        >
        Thanks in advance
        Jan
        >
        I'm assuming you're using MySQL - just because most people here are. If
        so, you don't even need PHP. Try comp.databases. mysql for a SQL only
        solution.

        --
        =============== ===
        Remove the "x" from my email address
        Jerry Stuckle
        JDS Computer Training Corp.
        jstucklex@attgl obal.net
        =============== ===

        Comment

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