Display a time column value

Hey,.
I'm trying to display a column value only once for a folder, not a static value. Changes in value and it can be a lot of values. I don't think that grouping will work since the Date value is dynamic. I use Oracle for Toad 10.5. There are 4 files with data from this trial.
select Date, Person, Language, Country
from TableA
TableA
Date            Person  Language   Country
01/25/2013       James   English
12/20/2012       James   English
                                     US
                                     AF
Want to display only
Date            Person  Language   Country
01/25/2013       James   English
12/20/2012  
                                     US
                                     AF
Thanks for reading this thread!

Published by: Nikki on January 7, 2013 13:08

Hello

You can use the ROW_NUMBER analytic function to see if a given line is the 1st row in a group and display only the columns of the person and the language when it is:

WITH     got_r_num     AS
(
     SELECT       dt          -- DATE is not a good column name
     ,       person, language, country
     ,       ROW_NUMBER () OVER ( PARTITION BY  person
                                  ,          language
                           ORDER BY          dt
                         )  AS r_num
     FROM      table_x
)
SELECT       dt
,       CASE WHEN r_num = 1 THEN person   END)     AS person
,       CASE WHEN r_num = 1 THEN language END)     AS language
,       country
FROM       got_r_num
ORDER BY  person, language, dt     -- If wanted
;

Your front end, perhaps as a way of hiding these values when you want to. PAUSE function in SQL * more to it; I don't know if toad has nothing comparable.

I hope that answers your question.
If not, post a small example data (CREATE TABLE and only relevant columns, INSERT statements) where the query above generates erroneous results, and also after the good results you want from this data.
Explain, using specific examples, how you get these results from these data.
Always say what version of Oracle you are using (for example, 11.2.0.2.0).
See the FAQ forum {message identifier: = 9360002}

Tags: Database

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