oracle sql

hello experts,
how can I limit display in my sql. I have a table which displays multiple values for a key value. I want to display only one key value and multiple non-key values in my output. here is what I want to display --

column_1                                   column_2
hostname1                                i/p1
hostname2                               i/p1
hostname3                                i/p1
hostname4                                i/p1
 and so on.
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awking00Information Technology SpecialistCommented:
>>here is what I want to display<<
And what values are you starting with? Are they like this?
hostname1      i/p1
hostname1      i/p2
hostname1      i/p3
hostname2      i/p1
hostname2      i/p2
hostname2      i/p3
hostname2      i/p4
hostname2      i/p5
hostname3      i/p1
hostname4      i/p1
hostname4      i/p2
Guy Hengel [angelIII / a3]Billing EngineerCommented:
you can do that indeed with a inline query, though normally this should be done in a reporting tool.;
select case when rn = 1 then column1 end column1
  , column2
 from ( select column1, column2, row_number() over (partition by column1 order by column2) rn
          from yourtable
     ) sq
order by column1, rn

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awking00Information Technology SpecialistCommented:
If so,
select decode(rn,1,column_1) column_1, column_2 from
(select column_1, column_2,
 row_number() over (partition by column_1 order by column_2) rn
 from tab1);
awking00Information Technology SpecialistCommented:
Sorry, didn't see the post from angelIII before I submitted.
Steve WalesSenior Database AdministratorCommented:
Guy's answer pretty much sums it up ...

But for learning the tools available to you, you can do this in SQLPlus by entering the BREAK command:

break on column_1
select column_1, column_2 from table order by column_1, column_2

You can clear your breaks by "clear breaks"

Refer to the Documentation for all formatting options available to you:
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