Different people living in same address same Account

Question

I have Display_name, Address,Account and few other columns in a table. I need people(Display_name) at the same Address with the same account number and a different name (Display_name). For example wife and husband living at the same address and account number.
Please give me some idea with the sql. Thank you.

Answer 1

Hi,
This sounds like a job for the COUNT function:
WITH     got_cnt       AS
     SELECT  display_name          -- or whatever columns you want
     ,     COUNT (DISTINCT display_name) OVER ( PARTITION BY  address
                                                     ,                    account
                                        ) AS display_name_cnt
     FROM    a_table
SELECT  display_name          -- or whatever columns you want
FROM     got_cnt
WHERE     display_name_cnt     > 1
;Analytic functions are computed after the WHERE clause is appled. To use the results of an analytic function in a WHERE clause, we have to compute the function in a sub-query, then we can use that value in the WHERE clause (or anywhere else) of the parent query,.
I hope this answers your question.
If not, post a little sample data (CREATE TABLE and INSERT statements, relevant columns only), and also post the results you want from that data.
Explain, using specific examples, how you get those results from that data.
Always say which version of Oracle you're using.
Edited by: Frank Kulash on Feb 1, 2011 10:54 AM