group by and count of each group

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group by and count of each group

Author

Topic

rtutus
Aged Yak Warrior

522 Posts

Posted - 2007-10-23 : 11:44:56

Hi,
I use group by myItem, that displays rows for each value of myItem.
I want at the end of each group for each specific myItem, I want an extra row to tell me the count of the rows for that group.

How do i do that please. Here s what I need, for example for this set of rows:

myItem colum2 colum3
711056 22662 Finances / -2291 -2479916
711056 22663 Finances / -2380 -2576255
711056 43428 Cda) -323 -349635
711056 43428 . -B-(Cda) -44 -47628
711057 44348 . -B-(Cda) -355 -384273
711057 47033 . -B-(Cda) -1278 -1383384

I need 2 extra rows, one at the end of the items 711056 telling me there are 4 rows for the item 711056 and one row at the very end telling me there are: 2 rows for the item: 711057

Thanks a lot.

SwePeso
Patron Saint of Lost Yaks

30421 Posts

Posted - 2007-10-23 : 12:04:28

COUNT(*) OVER (PARTITION BY MyItem)

E 12°55'05.25"
N 56°04'39.16"

stonebreaker
Yak Posting Veteran

92 Posts

Posted - 2007-10-23 : 12:13:50

You could do this a couple of ways. I would probably declare a cursor for distinct values of myItem, then do two select statements:

select myItem, column2, column3
where myItem = value of cursor

select myItem, count(*)
where myItem = value of cursor

fetch next from cursor

madhivanan
Premature Yak Congratulator

22864 Posts

Posted - 2007-10-24 : 03:11:40

quote:
Originally posted by stonebreaker

You could do this a couple of ways. I would probably declare a cursor for distinct values of myItem, then do two select statements:

select myItem, column2, column3
where myItem = value of cursor

select myItem, count(*)
where myItem = value of cursor

fetch next from cursor

Did you read Peso's reply?

Madhivanan

Failing to plan is Planning to fail

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