Detecting multiple occurences of a value in data? (conundrum)

Ok, if there are any good java utilities to help, this is where I'm going to find them...
I'm trying to detect multiple occurences in a data set. Piling them into an array and using Array.sort() was a good start - I'm trying to find the max and min value of data that occurs more than once in the set.
However, when the data set becomes much larger, I can't hold the set in memory. Is there an elegant solution to this? I'm at a loss to find a nice way of doing it. Its an interesting problem...
Thanks,
Steve

Hi Steve!
You can do this with a bit of programming yourself :-) If all values don't fit into your memory, just split them into smaller pieces. Do you need to sort out all duplicates or do you need to detect them only?
The idea:
Create a new ArrayList oder a Set of your choice and put some elements in it (a fixed number or just wait for an OutOfMemoryException to be thrown and catch this). Then sort the ArrayList and write it to a temporary file, store the file handle or name in a seperate list. Go on like this until all your data is sorted.
After that, build one loop fetching just one value from each file and compare them - mainly this is mergesort. If duplicate values occur then, well, you have dupes :-)
If needed I could look for the source...
Cheers,
Jan

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Hi,
Find the piece of code below it can help you:
data: begin of itab occurs 0,
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        end of itab.
data: itab2 like table of itab occurs 0 with header line.
data: count type i.
start-of-seleciton.
itab-field1 = a.
append itab.
itab-field1 = a.
append itab.
itab-field1 = a.
append itab.
itab-field1 = b.
append itab.
sort itab by field1.
loop at itab.
count = count + 1.
at end of field1.
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itab2-field1 = itab-field1.
itab2-field2 = count.
append itab2.
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Dispaly output table.
loop at itab2.
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Reward the points if it is helpful.

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How to replace multiple occurences of space in a string to a single space?

How to replace multiple occurences of space in a string to a single space?

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I think I did not explain phrase it correctly..Technicallyh NodeA.Element1 value should be copied to NodeB.Element2..As long as I can generate counter to NodeA.Element1 and hold the value somewhere to copy to NodeB.Element2, that would be fine..
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How to select the first occurence of a value from a field in an internal table ?
I don think , we can use select query .
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provide syntaxs also .

Hi...
You have to use this code.
DATA : Begin of IT_MARA occurs 0,
 mtart type mara-mtart,
 matnr type mara-matnr,
 meins type mara-meins,
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START-of-SELECTION.
SELECT MTART MATNR MEINS FROM MARA INTO TABLE IT_MARA.
END-OF-SELECTION.
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 <<<<WRITE YOUR CODE here>>
 ENDAT.
ENDLOOP.
You can also use.
LOOP AT IT_MARA.
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 <<<<WRITE YOUR CODE here>>
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ENDLOOP.
Reward if Helpful.

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I'm working with the Kinect for windows v2 and I want to detect multiple people using the Kinect audio frame source.
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Sample Data
CREATE TABLE SAMPLE_DATA
 DOMAIN_NAME VARCHAR2(100),
 QTD NUMBER,
 LOAD_DATE DATE
-- Insert
BEGIN
FOR lc IN 1..20
LOOP
 FOR ld IN 1..30
 LOOP
 INSERT
 INTO SAMPLE_DATA VALUES
 'DM_'
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 round(dbms_random.value(0,1000)),
 SYSDATE-ld
 END LOOP;
END LOOP;
COMMIT;
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FROM
(SELECT DOMAIN_NAME,
 QTD,
 LOAD_DATE
FROM
 (SELECT DOMAIN_NAME,
 QTD,
 LOAD_DATE
 FROM SAMPLE_DATA
 WHERE LOAD_DATE = TRUNC(SYSDATE-3)
 ORDER BY QTD DESC
WHERE ROWNUM <=10
UNION ALL
SELECT 'Others' DOMAIN_NAME,
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 LOAD_DATE
FROM
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 QTD,
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 QTD,
 LOAD_DATE
 FROM SAMPLE_DATA
 WHERE LOAD_DATE = TRUNC(SYSDATE-3)
 ORDER BY QTD DESC
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GROUP BY LOAD_DATE
ORDER BY QTD DESC
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DM_20 933 24/03/13
DM_11 913 24/03/13
DM_3 743 24/03/13
DM_13 572 24/03/13
DM_12 568 24/03/13
DM_9 564 24/03/13
DM_6 505 24/03/13
DM_5 504 24/03/13
DM_2 480 24/03/13
Please, Help me get in one query this result using a range of date.
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Others 2888 24/03/13
DM_1 1000 24/03/13
DM_20 933 24/03/13
DM_11 913 24/03/13
DM_3 743 24/03/13
DM_13 572 24/03/13
DM_12 568 24/03/13
DM_9 564 24/03/13
DM_6 505 24/03/13
DM_5 504 24/03/13
DM_2 480 24/03/13
Others 1948 25/03/13
DM_1 807 25/03/13
DM_8 764 25/03/13
DM_7 761 25/03/13
DM_11 656 25/03/13
DM_18 611 25/03/13
DM_17 523 25/03/13
DM_14 467 25/03/13
DM_19 447 25/03/13
DM_15 437 25/03/13
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I got the solution. Just sharing.
I used analytic functions that make my job easy.
Sample Data
DOMAIN_NAME QTD LOAD_DATE
DM_1 807 25/03/2013
DM_1 1000 24/03/2013
DM_2 226 25/03/2013
DM_2 480 24/03/2013
DM_3 244 25/03/2013
DM_3 743 24/03/2013
DM_4 48 25/03/2013
DM_4 413 24/03/2013
DM_5 164 25/03/2013
DM_5 504 24/03/2013
DM_6 380 25/03/2013
DM_6 505 24/03/2013
DM_7 761 25/03/2013
DM_7 212 24/03/2013
DM_8 764 25/03/2013
DM_8 308 24/03/2013
DM_9 354 25/03/2013
DM_9 564 24/03/2013
DM_10 214 25/03/2013
DM_10 367 24/03/2013
DM_11 656 25/03/2013
DM_11 913 24/03/2013
DM_12 37 25/03/2013
DM_12 568 24/03/2013
DM_13 332 25/03/2013
DM_13 572 24/03/2013
DM_14 467 25/03/2013
DM_14 87 24/03/2013
DM_15 437 25/03/2013
DM_15 450 24/03/2013
DM_16 238 25/03/2013
DM_16 299 24/03/2013
DM_17 523 25/03/2013
DM_17 143 24/03/2013
DM_18 611 25/03/2013
DM_18 145 24/03/2013
DM_19 447 25/03/2013
DM_19 464 24/03/2013
DM_20 91 25/03/2013
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FROM
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 QTD,
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Others 2888 24/03/2013
DM_1 1000 24/03/2013
DM_20 933 24/03/2013
DM_11 913 24/03/2013
DM_3 743 24/03/2013
DM_13 572 24/03/2013
DM_12 568 24/03/2013
DM_9 564 24/03/2013
DM_6 505 24/03/2013
DM_5 504 24/03/2013
DM_2 480 24/03/2013
Others 1948 25/03/2013
DM_1 807 25/03/2013
DM_8 764 25/03/2013
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DM_11 656 25/03/2013
DM_18 611 25/03/2013
DM_17 523 25/03/2013
DM_14 467 25/03/2013
DM_19 447 25/03/2013
DM_15 437 25/03/2013
DM_6 380 25/03/2013

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Message was edited by:
        Gurpreet Singh

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Message was edited by:
Navneet Giria

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