How to propogate previous row value

All,
I have a query were I need to fill the null data with previous row value. Like I have a table were we record all the On hand quantity for a item for a date. Lets say I have only 2 rows in this table for a month then I am planning to write a view that will give me 31/30 rows for a month and if for a specific date is the value is null then it should read from previous row unitl it finds the data otherwise display 0.
Ex. Actual table
Item No Date Qty
1 1/1/2010 10
1 1/5/2010 15
View I have written, I need to fill the null Qty with previous row data
Item No Date Qty
1 1/1/2010 10
1 1/2/2010
1 1/3/2010
1 1/4/2010
1 1/5/2010 15
1 1/6/2010
I want something like this how can i do this?
Item No Date Qty
1 1/1/2010 10
1 1/2/2010 10
1 1/3/2010 10
1 1/4/2010 10
1 1/5/2010 15
1 1/6/2010 15
Thanks

Hi Sung, sorry by my delay
Basically I'm building a Client Framework that a lot of actions are automatically managed, then I extend Objects
for example EntityImpl. I let to user set any value to the
database mapped fields but I will check this values
using my own bussines rules before to insert into database
and if this values are wrong I display an alert.
My problem is that I catch insert event to call validate
functions. But when any value is wrong I will show an alert, but if user commits transaction after validate
funcion is not revalidated. Well I supose that is a bad implementation for validation rules, now amb reading about
Validationlistener because I think is the best way to do
all that I need. I let to the user add field values but
these values not will commited while validationListeners
return isValid = true;
Thanks Sung.
Albert.

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Hello ,
I have this sample data
create table #student_academic
pk_id int identity(1,1) primary key ,
student_id int ,
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[aggr_marks] float
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student_id ,
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Hello,
The difficulty of your example is
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I present a solution
if there is
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Go
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ORDER BY student_id) AS prev_aggr_marks
FROM #student_academic AS a
SELECT
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WHEN aggr_marks < prev_aggr_marks THEN 'Demoted'
WHEN aggr_marks >= prev_aggr_marks THEN 'Promoted'
END AS Status
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Charlie Dancoisne - Independent Consultant & Trainer (Please take a moment to "Vote as Helpful" and/or "Mark as Answer", where applicable. This helps the community, keeps the forums tidy, and recognises useful contributions. Thanks!)

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VICE_PRESIDENT                     DAYS_5    DAYS_10    DAYS_20    DAYS_30    DAYS_40
Fedele Mark                                                          35473      35209
Fedele Mark                                                          35479      35258
Schultz Christine                              35700
South John                                                                      35253
Stack Kevin                                    35701      35604      35402      35115
Stack Kevin                                    35705      35635      35415      35156
Stack Kevin                                    35706      35642      35472      35295
Stack Kevin                                    35707      35666      35477
Stack Kevin                                               35667      35480
Stack Kevin                                               35686
Unknown                             35817      35698      35596      35363      35006
Unknown                                        35702      35597      35365      35149
Unknown                                        35724      35599      35370      35155
Unknown                                                   35600      35413      35344
Unknown                                                   35601      35451      35345
Unknown                                                   35602      35467
Unknown                                                   35603      35468
Unknown                                                   35607      35475
Unknown                                                   35643      35508
Unknown                                                   35644
Unknown                                                   35669
Unknown                                                   35684
Walmsley Brian                                 35725      35598
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Hi,
I was trying to use the EARLIER function but couldn't make it work:
EVALUATE
SUMMARIZE (
CALCULATETABLE (
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'Ano Letivo'[ID_TB_DIM_ANO_LETIVO] <= VALUE(26),
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93 -
101 - 93
84 - 101
85 - 84
104 - 85
Need some help. Thanks

Hi Pedro,
According to your description, you want to get the previous row data along with each row. Right?
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PowerPivot DAX Session Notes 2 – Previous Row
In this scenario, I suggest you select the three columns into one table(let's say TABLE1). Then you can try the expression below:
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Reference:
EARLIER Function (DAX)
Best Regards,
Simon Hou
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957911 wrote:
Oracle guru,
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rules
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select '000-ME-001' tag_number, 'Capacity 150' tag_details1, '000-TS-M-226' tag_details2 from dual union all
select '000-ME-001' tag_number, 'Capacity 250' tag_details1, '000-TS-M-227' tag_details2 from dual union all
select '000-ME-001' tag_number, 'Capacity 350' tag_details1, '000-TS-M-228' tag_details2 from dual union all
select '000-ME-002' tag_number, 'Capacity 150' tag_details1, '000-TS-M-226' tag_details2 from dual union all
select '000-ME-002' tag_number, 'Capacity 250' tag_details1, '000-TS-M-227' tag_details2 from dual union all
select '000-ME-002' tag_number, 'Capacity 350' tag_details1, '000-TS-M-228' tag_details2 from dual union all
select '000-ME-003' tag_number, 'Capacity 150' tag_details1, '000-TS-M-226' tag_details2 from dual union all
select '000-ME-003' tag_number, 'Capacity 250' tag_details1, '000-TS-M-227' tag_details2 from dual union all
select '000-ME-003' tag_number, 'Capacity 350' tag_details1, '' tag_details2 from dual
)How can I covert the values of tag_details1 as column name to achieve this result:
tag_number     Capacity 150     Capacity 250     Capacity 350
000-ME-001     000-TS-M-226     000-TS-M-227     000-TS-M-228
000-ME-002     000-TS-M-226     000-TS-M-227     000-TS-M-228
000-ME-003     000-TS-M-226     000-TS-M-227Hope you can help me, best regards.

select tag_number
     , max (decode (tag_details1, 'Capacity 150', tag_details2))
     , max (decode (tag_details1, 'Capacity 250', tag_details2))
     , max (decode (tag_details1, 'Capacity 350', tag_details2))
from test
group by tag_numberas in
SQL> with test as
2 (
3 select '000-ME-001' tag_number, 'Capacity 150' tag_details1, '000-TS-M-226' tag_details2 from dual union all
4 select '000-ME-001' tag_number, 'Capacity 250' tag_details1, '000-TS-M-227' tag_details2 from dual union all
5 select '000-ME-001' tag_number, 'Capacity 350' tag_details1, '000-TS-M-228' tag_details2 from dual union all
6 select '000-ME-002' tag_number, 'Capacity 150' tag_details1, '000-TS-M-226' tag_details2 from dual union all
7 select '000-ME-002' tag_number, 'Capacity 250' tag_details1, '000-TS-M-227' tag_details2 from dual union all
8 select '000-ME-002' tag_number, 'Capacity 350' tag_details1, '000-TS-M-228' tag_details2 from dual union all
9 select '000-ME-003' tag_number, 'Capacity 150' tag_details1, '000-TS-M-226' tag_details2 from dual union all
10 select '000-ME-003' tag_number, 'Capacity 250' tag_details1, '000-TS-M-227' tag_details2 from dual union all
11 select '000-ME-003' tag_number, 'Capacity 350' tag_details1, '' tag_details2 from dual
12 )
13 select tag_number
14       , max (decode (tag_details1, 'Capacity 150', tag_details2))
15       , max (decode (tag_details1, 'Capacity 250', tag_details2))
16       , max (decode (tag_details1, 'Capacity 350', tag_details2))
17    from test
18   group by tag_number
19 /
TAG_NUMBER MAX(DECODE(T MAX(DECODE(T MAX(DECODE(T
000-ME-002 000-TS-M-226 000-TS-M-227 000-TS-M-228
000-ME-001 000-TS-M-226 000-TS-M-227 000-TS-M-228
000-ME-003 000-TS-M-226 000-TS-M-227Edited by: Alex Nuijten on Jun 3, 2009 4:03 PM

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