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Simple SQL Update Problem

  • 01-07-2009 9:04am
    #1
    warrenaldo
    Registered Users, Registered Users 2 Posts: 500 ✭✭✭


    I have 3 columns:
    firstname (populated)
    surname (populated)
    fullname (empty)

    Update Mytable set fullname = firstname + " " + surname;

    It does not work - it puts 0.0 in all columns - however its a varchar column.

    Is it something obvious?


Comments

  • #2
    seamus
    Registered Users, Registered Users 2 Posts: 68,317 ✭✭✭✭seamus


    What DBMS are you using?

    If it's MySQL, you need to use CONCAT()

    Using an arithmetic operator makes MySQL think that you're adding numbers together and it will interpret all strings as 0.


  • #3
    E39MSport
    Registered Users, Registered Users 2 Posts: 3,721 ✭✭✭E39MSport


    SEL FNAME||LNAME


  • #4
    MsQuinn
    Registered Users, Registered Users 2 Posts: 211 ✭✭MsQuinn


    Update Mytable set fullname = trim(nz(firstname,"")) & " " & nz(trim(surname,""));

    SQL doesn't know what to do with nulls so convert them when you are trying to concatenate (can't spell).


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