How would I select a rolling/wrapping* set of rows from a table?
I am trying to select a number of records (per type, 2 or 3) for each day, wrapping when I 'run out'.
Eg.
2018-03-15: YyBiz, ZzCo, AaPlace
2018-03-16: BbLocation, CcStreet, DdInc
These are rendered within a SSRS report for Dynamics CRM, so I can do light post-query operations.
Currently I get to:
2018-03-15: YyBiz, ZzCo
2018-03-16: AaPlace, BbLocation, CcStreet
First, getting a number for each record with:
SELECT name, ROW_NUMBER() OVER (PARTITION BY type ORDER BY name) as RN
FROM table
Within SSRS, I then adjust RN to reflect the number of each type I need:
OnPageNum = FLOOR((RN+num_of_type-1)/num_of_type)-1
--Shift RN to be 0-indexed.
Resulting in AaPlace, BbLocation and CcStreet having a PageNum of 0, DdInc of 1, ... YyBiz and ZzCo of 8.
Then using an SSRS Table/Matrix linked to the dataset, I set the row filter to something like:
RowFilter = MOD(DateNum, NumPages(type)) == OnPageNum
Where DateNum is essentially days since epoch, and each page has a separate table and day passed in.
At this point, it is showing only N records of type per page, but if the total number of records of a type isn't a multiple of the number of records per page of that type, there will pages with less records than required.
Is there an easier way to approach this/what's the next step?
*Wrapping such as Wraparound found in videogames, seamless resetting to 0.
To achieve this effect, I found that offsetting the RowNumber by -DateNum*num_of_type (negative for positive ordering), then modulo COUNT(type) would provide the correct "wrap around" effect.
In order to achieve the desired pagination, it then just had to be divided by num_of_type and floor'd, as below:
RowFilter: FLOOR(((RN-DateNum*num_of_type) % count(type))/num_of_type) == 0
Related
the problem I am trying to solve is having a SAP Business Objects query calculate a variable for me because calculating it in a large excel file crashes the process.
I am having a bunch of columns with daily/weekly data. I would like to get a "1" for the first instance of Name/Person/Certain Identificator within a single week and "0" for all the rest.
So for example if item "Glass" was sold 5 times in week 4 in this variable/column first sale will get "1" and next 4 sales will get "0". This will allow me to have the number of distinct items being sold in a particular week.
I am aware there are Count and Count distinct functions in Business Objects, however I would prefer to have this 1/0 system for the entire raw table of data because I am using it as a source for a whole dashboard and there are lots of metrics where distinct will be part/slicer for.
The way I doing it previously is with excel formula: =IF(SUMPRODUCT(($A$2:$A5000=$A2)*($G$2:$G5000=$G2))>1,0,1)
This does the trick and gives a "1" for the first instance of value in column G appearing in certain value range in column A ( column A is the week ) and gives "0" when the same value reappears for the same week value in column A. It will give "1" again when the week value change.
Since it is comparing 2 cells in each row for the entire columns of data as the data gets bigger this tends to crash.
I was so far unable to emulate this in Business Objects and I think I exhausted my abilities and googling.
Could anyone share their two cents on this please?
Assuming you have an object in the query that uniquely identifies a row, you can do this in a couple of simple steps.
Let's assume your query contains the following objects:
Sale ID
Name
Person
Sale Date
Week #
Price
etc.
You want to show a 1 for the first occurrence of each Name/Week #.
Step 1: Create a variable with the following definition. Let's call it [FirstOne]
=Min([Sale ID]) In ([Name];[Week #])
Step 2: In the report block, add a column with the following formula:
=If [FirstOne] = [Sale ID] Then 1 Else 0
This should produce a 1 in the row that represents the first occurrence of Name within a Week #. If you then wanted to show a 1 one the first occurrence of Name/Person/Week #, you could just modify the [FirstOne] variable accordingly:
=Min([Sale ID]) In ([Name];[Person];[Week #])
I think you want logic around row_number():
select t.*,
(case when 1 = row_number() over (partition by name, person, week, identifier
order by ??
)
then 1 else 0
end) as new_indicator
from t;
Note the ??. SQL tables represent unordered sets. There is no "first" row in a table or group of rows, unless a column specifies that ordering. The ?? is for such a column (perhaps a date/time column, perhaps an id).
If you only want one row to be marked, you can put anything there, such as order by (select null) or order by week.
This site has been a great resource for me over the years but I finally ran into an issue i couldn't find a solution for already posted.
I have a list of names, dates and values. I need to turn the dates into the numbers and for them to start over for each well where value is greater than 0.
My thought was to create a loop but I'm short on skills to make it happen.
I found a post to create the counter but not how to loop it:
SELECT Name, row_number() over (order by (select NULL))
FROM [$ST_MASTER]
The Yellow Column Is What I Want to Create
You're in the right direction. Your over by need to change in two ways:
1) You need to restart the row number with each name.
2) You need to restart the row number when the value becomes zero.
After this, we just need to discard the row numbers for zero quantity rows. You'll see I did this by using the ZeroOnePartSort value.
One flow in this logic: This assumes (per your data sample) that once quantities go positive for a name, they don't go to zero again.
WITH ValSort AS (
SELECT Name, CASE WHEN value = 0 THEN 0 ELSE 1 END AS ZeroOnePart,
DateStamp, Value FROM dbo.STMaster
)
SELECT vs.Name, vs.DateStamp, vs.Value,
ROW_NUMBER() OVER(PARTITION BY vs.Name, vs.ZeroOnePart
ORDER BY vs.DateStamp) * vs.ZeroOnePart
FROM ValSort vs
Using SSRS 2010
I have Two groups YearMonth and Insured. I need to display only 50 records per page based on a group "Insured". So I have created parent group "GroupPageBreakOnly" and used this expression =CEILING(RowNumber(Nothing)/50).
I ensured that the Page Break at end is checked so that individual groups appear in individual page.
As a result the first page displays 31 rows, the second one 50 rows, and the third one 9 rows.
I tried to specify data region "Insured"
=CEILING(RowNumber("Insured")/50),
but it gives me an error:
...the value of the scope parameter of RowNumber must equal the name of the group directly containing the current group.
What am I missing here?
Unless you need this report to do other things, I would apply the grouping and aggregation in the Dataset itself which is generally a lot more efficient anyway.
Have you tried using ROW_NUMBER() OVER (PARTITION BY YearMonth, Insured ORDER BY YearMonth, Insured) to give the number of rows, perhaps even throwing in a % 50 at the end to see which group of 50 it fell into?
This can then be grouped on in your report.
I'm currently writing a stored procedure for my client to populate some tables that will be used to generate SSRS reports later on. Some of the data is based on specific stock formulas that are run on each of their clients' quarterly data (sent to them by their clients). The other part of the data is generated by comparing those results against those from other, similar sized clients. One of the things that they want tracked in their reports is the average of the top 25% of formula results for that particular comparison group.
To give a better picture of it, imagine the following fields that I have in a temp table:
FormulaID int
Value decimal (18,6)
I want to do the following: Given a specific FormulaID return the average of the top 25% of Value.
I know how to take an average in SQL, but I don't know how to do it against only the top 25% of a specific group.
How would I write this query?
I guess you can do something like this...
SELECT AVG(Q.ColA) Avg25Prec
FROM (
SELECT TOP 25 Percent ColA
FROM Table_Name
ORDER BY SomeCOlumn
) Q
Here's what I did, given the table shown above:
select AVG(t.Value)
from (select top 25 percent Value
from #TempGroupTable
where FormulaID = #PassedInFormulaID
order by Value desc) as t
The desc must be there, because the percent command will not actually do comparisons. It will just simply grab the first x number of records, with x being equal to 25% of the count of records it's querying. Therefore, the order by Value desc line then will grab the top 25% records which have the highest Value, and then sends that info to be averaged.
As a side note to all of this, this also means that if you wanted to grab the bottom 25% instead, or if your formula results are like a golf score (i.e. lowest is the best), all you would need to do is remove the desc part and you would be good to go.
I have a Column(cliente_x_hora, a numeric field) i put in a interval and count the number in each interval.I have 3 textfields(number of intervals,value between intervals and initial value). When I select the two first(with 5 intervals and 1000 value), the query run flawless and generate the expect barchart.
Query(with two select textfields):
SELECT INTERVAL, COUNT(*) TOTAL FROM (
SELECT CASE WHEN CLIENTE_X_HORA>0 AND CLIENTE_X_HORA<=1000.00 THEN '0<CLIENTE_X_HORA> <=1000.00'
WHEN CLIENTE_X_HORA>1000.00 AND CLIENTE_X_HORA<=2000.00 THEN '1000.00<CLIENTE_X_HORA><=2000.00'
WHEN CLIENTE_X_HORA>2000.00 AND CLIENTE_X_HORA<=3000.00 THEN '2000.00<CLIENTE_X_HORA><=3000.00'
WHEN CLIENTE_X_HORA>3000.00 AND CLIENTE_X_HORA<=4000.00 THEN '3000.00<CLIENTE_X_HORA><=4000.00'
ELSE '4000.00<CLIENTE_X_HORA' END INTERVAL, CLIENTE_X_HORA FROM SGD_CAUSA)
GROUP BY INTERVAL ORDER BY TOTAL
The barchart is
The problem is when I select the last field(initial value with, per example 2000), my barchart go crazy(i believe is adding up the discarded values below 2000):
That ELSE(>6000) should be much smaller than is showing.How can I solve that?
Best Regards,
DDias
CLARIFICATION from OP:
The query is the same as above but begins in 2000:
SELECT CASE WHEN CLIENTE_X_HORA>2000 AND CLIENTE_X_HORA<=3000.00... and ends in 6000:ELSE '6000.00<CLIENTE_X_HORA' END INTERVAL, CLIENTE_X_HORA FROM SGD_CAUSA) GROUP BY INTERVAL ORDER BY TOTAL
put the result in table form is impractical(we are talking about over 87 thousand rows) That happens always when i give an initial value different than ZERO.
Your ELSE is just that. It includes everything that is not matched by specific WHENs.
So if you do not start from zero, that last column will include everything below a lowest limit in addition to greater than highest limit.
So if you do not want this behavior, do not use ELSE at all. Use WHEN CLIENTE_X_HORA > 6000.00 (or whatever your highest limit is) as the last condition.
EDIT:
In your internal query filter out (with WHERE) the values that are below the lowest limit.
Since we no longer have unneeded low range, you no longer need the HAVING clause we added and you can even go back to using ELSE.
If your lowest limit is zero, then you will be filtering everything below 0, which I assume is nothing.