[Show all top banners]

Tyo Din
Replies to this thread:

More by Tyo Din
What people are reading
Subscribers
:: Subscribe
Back to: Computer/IT Refresh page to view new replies
 Oracle simple help
[VIEWED 6154 TIMES]
SAVE! for ease of future access.
Posted on 03-19-16 12:14 PM     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

I need to : select distinct * from my_table; it's not working.

What is alternative to this query? I can't use column_names in place of * because there are hundreds of columns in my table.

Thanks IT sajha Experts for ur answer.
 
Posted on 03-19-16 1:32 PM     [Snapshot: 37]     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

use dynamic query to get list of columns and concatenate select distinct keyword with it and run that dynamic query
 
Posted on 03-19-16 2:34 PM     [Snapshot: 42]     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

Thanks sajhamitra. But how to concatenate :
i) select column_name from all_tab_columns where upper(table_name)='EMP';
with
select distinct * from EMP.

I mean ,how to concatenate select distinct keyword with the dynamic query to list columns?

 
Posted on 03-19-16 5:16 PM     [Snapshot: 124]     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

SELECT DISTINCTcolumn_name,column_name
FROM table_name;

SELECT * From table_name;

Please understand (*) will return everything, hence DISTINCT *(everything) is a wrong sql statement.
DISTINCT specifically looks for unique result set,,The DISTINCT keyword can be used to return only distinct (different) values
 
Posted on 03-19-16 6:14 PM     [Snapshot: 155]     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

WakkaDikka Mitra, I do understand your explanation but i want the unique records in a table having more than 100 columns. I can't list all the column names after distinct keyword.
 
Posted on 03-19-16 10:06 PM     [Snapshot: 224]     Reply [Subscribe]
Login in to Rate this Post:     1       ?     Liked by
 

If your table has a PK all rows should be distinct by definition. If you are trying to just select DISTINCT field but somehow return all other columns what should happen for those columns that have more than one value for a particular field value? so You would need to use GROUP BY and some sort of aggregation on the other columns.

select * from table group by column name.
 
Posted on 03-20-16 12:04 AM     [Snapshot: 257]     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

try this

select distinct a.* from my_table a;
 
Posted on 03-20-16 6:06 PM     [Snapshot: 366]     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

Thanks Kunthaun; it worked.
 


Please Log in! to be able to reply! If you don't have a login, please register here.

YOU CAN ALSO



IN ORDER TO POST!




Within last 365 days
Recommended Popular Threads Controvertial Threads
श्राद्द
TPS Re-registration
सेक्सी कविता - पार्ट २
What are your first memories of when Nepal Television Began?
पाप न साप घोप्टो पारि थाप !!
पुलिसनी संग - आज शनिवार - अन्तिम भाग
निगुरो थाहा छ ??
ChatSansar.com Naya Nepal Chat
Lets play Antakshari...........
What Happened to Dual Citizenship Bill
Basnet or Basnyat ??
Sajha has turned into MAGATs nest
NRN card pros and cons?
मेरो अम्रिका यात्रा -२
Do nepalese really need TPS?
कता जादै छ नेपाली समाज ??
susta manasthiti lai ke bhanchan english ma?
कृष्ण नै अन्तिम सत्य
पुलिसनी संग - आज शुक्रवार - भाग २
Will MAGA really start shooting people?
Nas and The Bokas: Coming to a Night Club near you
राजदरबार हत्या काण्ड बारे....
Mr. Dipak Gyawali-ji Talk is Cheap. US sends $ 200 million to Nepal every year.
Harvard Nepali Students Association Blame Israel for hamas terrorist attacks
TPS Update : Jajarkot earthquake
is Rato Bangala school cheating?
NOTE: The opinions here represent the opinions of the individual posters, and not of Sajha.com. It is not possible for sajha.com to monitor all the postings, since sajha.com merely seeks to provide a cyber location for discussing ideas and concerns related to Nepal and the Nepalis. Please send an email to admin@sajha.com using a valid email address if you want any posting to be considered for deletion. Your request will be handled on a one to one basis. Sajha.com is a service please don't abuse it. - Thanks.

Sajha.com Privacy Policy

Like us in Facebook!

↑ Back to Top
free counters