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SQL Select Problem

  • 28-08-2007 11:47am
    #1
    Raskolnikov
    Registered Users, Registered Users 2 Posts: 10,148 ✭✭✭✭


    Hoping someone can help me out here . . .

    I have a table that contains a number of records. It has two fields, "Starter" and "Main Course". Typical data would look like this. . .

    Starter¦Main
    Soup, Beef
    Soup, Chicken
    Salad, Pork
    Soup, Beef
    Salad, Chicken
    Soup, Beef
    Salad, Pork
    etc . . .

    I need to try and select all similar pairs that occur in the table more than once. For example, in the above table, I would be looking to select Soup and Beef and Salad and Pork as they occur more than twice.

    Anyone help?


Comments

  • #2
    stipey
    Registered Users Posts: 273 ✭✭stipey


    My first tip would be to search the web - because it certainly doesn't strike me as a query somebody would still need assistance with after a quick trawl through google.

    The answer is more likely to stick in your mind if you discover it yourself through google or MSDN.

    I'll point you in the direction however - the key words to search for are "count", "group by" and (if you want to find instances where a combination appears more than once "having". It would help if you were to add +sql to your search to ensure you only get hits relating to SQL.


  • #3
    fasty
    Registered Users, Registered Users 2 Posts: 981 ✭✭✭fasty


    SELECT DISTINCT Starter, Main WHERE Count(Starter + Main) > 1


  • #4
    mathie
    Registered Users, Registered Users 2 Posts: 5,102 ✭✭✭mathie


    SELECT starter, main, COUNT(*) AS Expr1
    FROM yourtable
    GROUP BY starter, main
    HAVING (COUNT(*) > 1)


  • #5
    Raskolnikov
    Registered Users, Registered Users 2 Posts: 10,148 ✭✭✭✭Raskolnikov


    That works a peach Mathie, the problem I was having was that I was trying to put the (COUNT(*) > 1) into the WHERE part of my SQL query, that of course gave me an error.


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