the cells changed and how many times

Hello

We keep a record of each archive and we are adding a new record to the table because it's a change.

It may be that many records belong to the same id.

a large number of fields in the tables.

I want to make the difference between the recordings had the same id and how have changed several times.

I thought the same way on the forum.

WITH the DATA (acctid, addr1, addr2, city, province)

(SELECT 1 101 101, "wef", "sd" to double UNION ALL

Select 1, NULL, 101, "wef", "sd" to double UNION ALL

Select 2 101 101, "wef", "sd" to double union all

Select 3 101 101, "wef", "sd" to double UNION ALL

SELECT 4 102 102, "homeless", "dc" FROM dual)

, match_finder AS (SELECT acctid, addr1, addr2, city, State, count (*) OVER (PARTITION BY addr1, addr2, city, province) AS identical_rows)

DATA)

Select acctid, addr1, addr2, city, province

of match_finder

where identical_rows > 1 / * with the same record * /.

where identical_rows > 1 / * with different records * /


We can find a recording of the same or different in this example, but couldn't find that changed several times the cell.


the best solution is to write a trigger, but the data entry is complete.

examples of data

ID1st quarterQ2Q3Q4Date
1121110/02/2015 10:09
1221110/02/2015-19:09
1124202/12/2015-12:10
21581013/02/2015-19:09
3523601/12/2015-11:20
37241013/02/2015-07:00

Is it possible to display data as

IDfieldhas changed
11st quarter2
1Q31
1Q41
2--
31st quarter1
3Q31
3Q41

The goal; What (id) records how long have changed and what fields are changed several times.

yours sincerely.

Hello

You should always explain how you get these results from data provided.  For example "I want to show the number of lines where each column (T1 to T4) has changed from one line to the other, you place your order by entry_date.  The combination (id, entry_date) is unique, and no column can be NULL.  The q1 through Q4 columns can be NULL; change null to any value (or a null value) is considered to be a change.  If a column not ID never change for a given (e.g., column q2 for id = 1 in this example of data) then I don't want to see (id, field) combination at all.  If no columns for a change of id (for example, id = 2) then I don't want to present this card at all. »

If this is what you want, here's a way to do it:

WITH unpivoted_answers AS

(

SELECT id, field

DECODE (response

LAG (response

) T

response | '?'

) OVER (PARTITION BY id, field)

ORDER BY entry_date

)

0

) T

) AS changed

Answers

MUST INCLUDE NULL VALUES

(response

FIELD IN (q1, q2, q3, q4)

)

)

SELECT id, field

SUM (changed) - 1 AS number_of_changes

Of unpivoted_answers

GROUP BY id, field

SEEN the SUM (changed) > 1

ORDER BY id, field

;

Tags: Database

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