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Oracle DB SQL: record with user_id, name and oldest time stamp (show only oldest time stamp)


#1

Oracle DB SQL: record with user_id, name and oldest
time stamp (show only oldest time stamp)


#2

Hi Sven

On 23/03/11 11:35, Sven Aluoor wrote:

SQL statement:

SELECT user_id, jc_name, upd_time
FROM user_jc
WHERE user_id IN ( SELECT user_id
FROM user_jc
WHERE JC_NAME LIKE ‘PPF_S_%’ ESCAPE ‘’
GROUP BY user_id
HAVING COUNT (user_id)> 1)
AND JC_NAME LIKE ‘PPF_S_%’ ESCAPE ‘’
GROUP BY user_id, jc_name, upd_time

I’m thinking, but I’ve not tested, this:

SELECT user_id, jc_name, MIN(upd_time)

GROUP BY user_id, jc_name;


Cheers,
Norm. [TeamT]


#3

On Fri, Mar 25, 2011 at 12:46 PM, Norman Dunbar wrote:

Hi Sven
I’m thinking, but I’ve not tested, this:

SELECT user_id, jc_name, MIN(upd_time)

GROUP BY user_id, jc_name;

Thanks, but I tried this already. Doesn’t work.

cheers Sven


#4

SELECT user_id, jc_name, MIN(upd_time)

It must be Fri and I must still be asleep… for just an instant, 1/10th of
a second kind-of-thing, I thought:

He said oldest, it should be max…

:slight_smile:

Roger S.


#5

This works for me on a limited data set:

select user_id,jc_name,upd_time
from (
– begin inner bit
select user_id, jc_name, upd_time,
row_number() over (partition by user_id order by
user_id,jc_name,upd_time) as ranking
from user_jc
where jc_name like ‘PPF_S_%’ escape ‘’
)
– end inner bit
where ranking = 1
order by user_id;

Hopefully Yahoo/Outlook won’t destroy the formatting!

Cheers,
Norm. [TeamT]

Norman Dunbar
Contract Senior Oracle DBA
Capgemini Database Team (EA)
Internal : 7 28 2051
External : 0113 231 2051

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