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oracle query

  • 19-02-2004 4:00pm
    #1
    johnnyc
    Registered Users, Registered Users 2 Posts: 618 ✭✭✭


    I have to join 2 columns in the same table. The join has to be distinct as i want to put the result into a combo box. I have received the following error when i execute my sql statement. I am sorry for all programmers i know this is a database probs any suggestion please


    SQL> select DISTINCT(Street1) from Map Where Street1 != (select DISTINCT(Street2) from Map);



    select DISTINCT(Street1) from Map Where Street1 != (select DISTINCT(Street2) from Map)
    *
    ERROR at line 1:
    ORA-01427: single-row subquery returns more than one row


Comments

  • #2
    Karoma
    Registered Users, Registered Users 2 Posts: 19,396 ✭✭✭✭Karoma


    i'm tired and possibly completely missing the point, but
    select DISTINCT(Street1) from Map Where Street1 != Street2

    would work (?) .. it makes more comparisons (performance drop) ..but it's straight forward and works..

    although you say you want to "join" the two columns... that isn't a join. select column1,column2 ....


  • #3
    johnnyc
    Registered Users, Registered Users 2 Posts: 618 ✭✭✭johnnyc


    Thanks very much that guery is right?


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