Calculating Median Value From Measures And Dimensions
May 24, 2007
I am facing some problem in calculating Median
I am trying to calculate the median value using one of the measures and a dimension value.
Time is a measure in my cube and OpId is one of the dimensions.The result is as follows:
opid time median
1 55
2 23
3 23
Total 23
The Time here for Op Id 1 is the aggregation for all the rows whose OpId is 1.I want the median of the values whose OpId is 1 which is not showing at the moment.
What I am getting here is the median for all of the OpId but what I really want is the median for each of the individual Opid's as well.
I am using a calculated field Median with the following expression.
I have a problem where I have 3 three measures in a virtual cube: "Actual", "Budget" and "Full Year Budget".
The dimensions I have are: - Account No_ / Name - Cost Code - Sub Cost Code - Time/Dates - Budget Name
Both "Actual" & "Budget" measures need to be filtered/dimensioned by: - Account No_ / Name - Cost Code - Sub Cost Code - Time/Dates (exclusive to "Actual", "Budget")
Thus have put these in one cube
AND "Full Year Budget" needs to be filtered/dimensioned by: - Account No_ / Name - Cost Code - Sub Cost Code - Budget Name (exclusive to "Full Year Budget")
THUS have put this as one cube…
I then created a virtual cube, with the 2 cubes thinking that the dimensions I created in the original cubes would only filter the measures of the original cube measures in the virtual cube. ...BUT all dimension filters in the virtual cube filter all measures in the virtual cube, irrespective of which dimensions were created with the original cubes.
Actually I want to do distinct sum on a measure group, please find the below table as sample
XL Measure group LKÂ Â Â Â OKÂ Â Â Â Â Amount 1Â Â Â Â Â Â Â 10Â Â Â Â Â Â Â Â 100 1Â Â Â Â Â Â Â Â 11Â Â Â Â Â Â Â Â 100 3Â Â Â Â Â Â Â Â Â 30Â Â Â Â Â Â Â 250 3Â Â Â Â Â Â Â Â Â 31Â Â Â Â Â Â Â 250 3Â Â Â Â Â Â Â Â Â 32Â Â Â Â Â Â Â 250
For the above measure group two dimensions have relationships, One is L dimension which is having relationship with XL on LK and One is O dimension which is having relationship with XL on OK. If I drag L dimension attributes  it should show results as below
LK LName Amount 1    A        100 3    C         250
But above results are coming as below
LK LName Amount 1    A        200 3    C         750
If I drag O dimension attributes along with L dimension, it should show results as below.
LK  LName  OK     OKName  Amount 1        A        10      XYZ        100 1        A        11      UVW       100 3        C        30      PQR         250 3        C         31     KLM        250 3        C         32     TUV        250
I used formula Measures.Amount/Measures.Count, this formula is not showing correct results when I don't drag any dimensions, it is showing results for All member as 425, but it should show as 350.
So I made a same change ([L].[LK].Currentmember, Measures.Amount)/([L].[LK].Currentmember,Measures.Count), this worked fine but performance is very low and so stopped working on this.
Atlast I did the measure group like this
LK    OK     LAmount  OAmount 1       10        100       100 1        11        0           100 3         30       300       300 3         31       0           300
I want to show Measures.LAmount when only L dimension is querying and want to show OAmount when both L dimension and O dimension are querying. Is this possible ?
Hi All, I have a table that of server names and their execution times that run in to hundreds of thousands of records. What i need is some SQL that gives me the median execution times for each of these different servers. At the moment i have some SQL that only gives me the median for all the records in the table not the median execution time for every different server name. For example my tables looks something like this;
Here is my SQL, hope someone can modify it and thanks in advance.
Code:
SELECT DISTINCT instance, exec_time AS median FROM (SELECT instance, exec_time FROM (SELECT TOP 1 exec_time = exec_time * 1.0, instance FROM (SELECT TOP 50 PERCENT exec_time, instance FROM llserverlogs ORDER BY exec_time) sub_a ORDER BY 1 DESC) sub_1 UNION ALL SELECT instance, exec_time FROM (SELECT TOP 1 exec_time = exec_time * 1.0, instance FROM (SELECT TOP 50 PERCENT exec_time, instance FROM llserverlogs ORDER BY exec_time DESC) sub_b ORDER BY 1) sub_2)
I need to calculate a median on a column in a table. The code I have is:
Code: Select gender, CASE when gender = 'F' then 'Female' when gender = 'M' then 'Male' else 'Unknown' end as test, datediff(day, [admit_date], getdate()) as 'datediffcal', from [tbl_record] How do I calculate the median on the datediffcal column?
It doesn't matter if the resultset only shows the median result. So if the output shows:
calculating a rolling median over a period of 3 years.
I already calculate median and I've tried to calculate rolling median over a period of 3 years as below.
 MEDIAN([Date].[Year].CurrentMember.Lag(3):[Date].[Year].CurrentMember,[Measures].[median])
What this does is, it calculates the median of the medians over the period of 3 years. But, what I'm looking for is the overall median of the underlying measure over a period of 3 years.
What I have now:
Year1 - 41,52,73; Â Median1 - 52 Year2 - 6,9,12; Â Median2- 9 Year3 - 24,68,89; Median3 - 68 Overall Median of 9,52,68 - 52
What I need:
Year1 - 41,52,73; Â Median1 - 52 Year2 - 6,9,12; Â Median2- 9 Year3 - 24,68,89; Median3 - 68
Overall Median of 41,52,73,6,9,12,24,68,89 is 41Â
I recently had to use my own little median technique again on a report here at work, and had posted it before, but wasn't sure if anyone had seen it. I have read Celko's and others techniques for generating a median and haven't seen one more efficent.
Does anyone have a better way they can think of? I think this bad boy is pretty short & efficient.
First, if you want to return the middle number or the higher one next to the middle if there is an even number:
SELECT x.Value AS median FROM Vals x CROSS JOIN Vals y GROUP BY x.Value HAVING SUM(SIGN(x.Value-y.Value)) IN (1,0)
Change the " IN (1,0)" to "IN (-1,0)" to get the lower value if there is an even # of values.
Basically, we are saying compare each number to all possible numbers, and add up values of 1,0 or -1 depending if the first number is less, equal or higher than the second. The number that returns 0 is right in the middle ... If there is no middle, a -1 or 1 is returned. There will never be a 0 and (-1 or 1) at the same time returned.
To get the financial median (avg of the 2 values middle values if there is an even number), you need to encapsulate the results of the above into a subquery, allow for not just (-1,0) but all three (-1,0,1) and then take the AVG of the values returned.
That is,
SELECT Avg(Median) as Median FROM ( SELECT x.Value AS median FROM Vals x CROSS JOIN Vals y GROUP BY x.Value HAVING SUM(SIGN(x.Value-y.Value)) IN (1,0,-1) ) A
If there is an even number of values, the lower and higher middle ones are averaged. If there is an odd number, only the middle value is returned and averaged (which of course has no effect).
Most other techniques used several COUNT(*) subqueries which this one avoids.
I have a table that contains the following: customer (ID of customers) product (Product description numeric value) UOM (unit of measure like each or pak) avgprice (Avg proce that this product and uom was sold)
I need to find the median value for a product, uom. Then I need create a table that shows product,uom,avgprice,median grouped by product and uom I have been at this for two days with no luck
I have a long term need for a median function, I was wondering if anyone has or knows of some code or user defined functions somewhere that would do this. Ideally you could use it just liket the rest of the aggregate functions like AVG, etc.
I have looked all over the web to try to find some very basic / simple explanations of how to get a median value from a group of records in a table but with no luck
the problem i am having is that all the information i find is always centered around getting a median using every single row in the table. except i have groups of data in the table and want to work out a median for each group. the group is identified by 4 different columns (the 5th column is what i want to get the median on but for each group not the entire table) and i want to produce a resulting table that has 1 row for each group and therefore contains the median value for the group instead of the individual numbers that it currently has. e.g. the current table is like this
column1 column2 column3 column 4 column5(median of this)
value 1 value 2 value 3 value 4 1.2 value 1 value 2 value 3 value 4 1.0 value 1 value 2 value 3 value 4 1.5 value 2 value 3 value 4 value 5 0.2 value 2 value 3 value 4 value 5 0.4 etc...
and i need a query to get the results to show like this
column1 column2 column3 column 4 column5
value 1 value 2 value 3 value 4 1.0 value 2 value 3 value 4 value 5 0.3 etc...
This is driving me crazy and i will be very helpful if anyone can help
the statement i need to add it to is:
select pat_demid, pat_lastname, meas_gendate, meas_id, test_gendate, avg(srtot)as meansrtot, avg(sreff)as meansreff, avg(BFRaw)as BF_Rawmean, avg(BFTGV)as BF_TGVmean, count(srtot)as countsrtot, count(sreff)as countsreff from bodyparametersf where (srtot is not null) OR (sreff is not null) group by pat_demid, pat_lastname, meas_gendate, meas_id, test_gendate
I need to calculate Median on each calculated result from the query below. There is one Median function available in SQL2K but it is not working. Can anyone help me in this regard.
------------------------------------------------------------------------ SELECT INS.Code As [code],INS.FinYr as [YEAR], ' ' As [FIRE BUSINESS], (INSRev.FI_NetPremLessIns / INSRev.FI_GrPremium) * 100 As [Rention Ratio], (INSRev.FI_NetClaimPaid/INSRev.FI_AdjNetPremium)*100 As [Claim Ratio], ((INSRev.FI_AgencyCommPaid+INSRev.FI_ReInsCommPaid+INSRev.FI_MgmtExpenses+INSRev.FI_OthExpenses)/INSRev.FI_AdjNetPremium)*100 As [Expense Ratio], ((INSRev.FI_NetClaimPaid/INSRev.FI_AdjNetPremium)*100)+(((INSRev.FI_AgencyCommPaid+INSRev.FI_ReInsCommPaid+INSRev.FI_MgmtExpe nses+INSRev.FI_OthExpenses)/INSRev.FI_AdjNetPremium)*100) As [Combine Ratio], (INSRev.FI_ClosingBal/INSRev.FI_NetClaimPaid) As [Unexpired Risk Reserve to Net Claim(x)],(INSRev.FI_MgmtExpenses/INSRev.FI_AdjNetPremium)*100 As [Management Expenses to Adj. Net Premium], (INSRev.FI_AgencyCommPaid/INSRev.FI_AdjNetPremium)*100 As [Agency Commissioned to Adj. Net Premium]
FROM (InsuranceGen As INS LEFT JOIN INSURANCEGen As INS1 ON (INS1.FinYr=INS.FinYr-1 AND INS.Code=INS1.Code)) LEFT JOIN INSRevGen as INSRev ON (INS.Code=INSRev.Code AND INS.FinYr=INSRev.FinYr) WHERE INS.Code IN ('ABC1','ABC2','ABC3') AND INS.FinYr=2005 ORDER BY INS.Code, INS.FinYr ----------------------------------------------------------------------
Using SQL Server 2005, I have the following query to calculate the median sales of each quarter over the past 5 years:
WITH CompMedian AS
(
SELECT SoldDate, SoldPrice, ROW_NUMBER() OVER(PARTITION BY Convert(Varchar(5),Year(SoldDate)) + Convert(Varchar(5), RIGHT(CAST(100+DATEPART(QQ,SoldDate) AS CHAR(3)), 2)) ORDER BY SoldPrice) AS RowNum, COUNT(*) OVER(PARTITION BY Convert(Varchar(5),Year(SoldDate)) + Convert(Varchar(5), RIGHT(CAST(100+DATEPART(QQ,SoldDate) AS CHAR(3)), 2))) AS Cnt FROM tbl_Orders WHERE Status = 'Sold'
SELECT Convert(Varchar(5),Year(SoldDate)) + Convert(Varchar(5), RIGHT(CAST(100+DATEPART(QQ,SoldDate) AS CHAR(3)), 2)) AS CompDate, AVG(SoldPrice) AS CompMedian
FROM CompMedian
WHERE RowNum IN((Cnt + 1) / 2, (Cnt + 2) / 2)
GROUP BY Convert(Varchar(5),Year(SoldDate)) + Convert(Varchar(5), RIGHT(CAST(100+DATEPART(QQ,SoldDate) AS CHAR(3)), 2))
ORDER BY CompDate;
Now my client would like me to change the query so that each quarter would represent the median for the past 12 months ending with that quarter. I've been looking at this for hours and I'm at a loss. Anyone have any thoughts?
I am converting a report created using Crystal Reports 10 to Reporting Services. The report contains a list of items with dollar values. The original report displays both the Average and Median value. I can easily ( using avg(Field1.Value!) ) determine the average but cannot find a function to determine the median.
I have a table (cars) with 3 fields:VIN, Class, sell_price101, sports, 10000102, sports, 11000103, luxury, 9000104, sports, 11000105, sports, 11000106, luxury, 5000107, sports, 11000108, sports, 11000109, luxury, 9000i need to write a query that WITHOUT USING A FUNCTION will return themedian selling price for each class of car. result should look like:Class, Med_Priceluxury, 9000sports, 11000thanks to all u SQLers
I read the follow query about calculating median posted by Daivd Portaon 10/8/03.CREATE TABLE SomeValues (keyx CHAR(1) PRIMARY KEY, valuex INTEGER NOTNULL)INSERT INTO SomeValues VALUES ('A',1)INSERT INTO SomeValues VALUES ('B',2)INSERT INTO SomeValues VALUES ('C',3)INSERT INTO SomeValues VALUES ('D',4)INSERT INTO SomeValues VALUES ('E',5)SELECT S1.valuex AS medianFROM SomeValues AS S1, SomeValues AS S2GROUP BY S1.valuexHAVING SUM(CASE WHEN S2.valuex <= S1.valuexTHEN 1 ELSE 0 END)[color=blue]>= ((COUNT(*) + 1) / 2)[/color]AND SUM(CASE WHEN S2.valuex >= S1.valuexTHEN 1 ELSE 0 END)[color=blue]>= (COUNT(*)/2 + 1)[/color]I have difficulty to understand the having clause. If S1 and S2 arethe same table, what it means by S2.valuex >= S1.valuex? Could somegive me a help?Also, if I have a table structured as:classID field1 field2 field3c1 1 2 3c1 4 5 6c1 7 8 9c2 9 8 7c2 6 5 4c2 3 2 1Is there a way to create a user-defined function that can get themedian for each field as easy as the average function. Such asselect distinct classID,median(field1),median(field2),median(field3)from [tablename]group by classIDThanks in advance
I used the Median() function in a calculated measure in a cube. All seemed well until one of my users, a statistician, pointed out that the displayed values were incorrect. I investigated this and finally built the simplest cube with three records and the displayed median does not make sense, i.e. equal what a median value should be.
The 3 records have loan amounts as a measure with these values: $102,500, $168,400, and $172,181 and loan number keys of 1, 2, and 3. That's it.
The median should be $168,400 since the number of items is odd and that is the middle value.
But the cube calculated measure displays $170,290.50. It appears to be taking the average of the middle row and the next value.
When I increase the number of records I get the same odd behavior but it not only alternates (of course) with odd and even (since they use different formulats for odd and even) but the odd wrong results alternate within themselves. The apparent calculations for 5 or 7 records are different compared to 3, 9, 11, 13, 15, 17 records. The first set seems to be calculating odd number of items median by averaging the middle value + the value BEFORE the middle value while the second set of odd rows (3, 9, etc) seem to be calculating median by averaging the middle value + the value AFTER the middel value. The even numbers result in the larger of the two middle values being selected instead of the average (financial median) or the lower number (as one poster claimed for statistical median).
I have been trying to find a T-SQL function that would calculates a Median statistical value for me. I am runnnig on SS 2005? Any examples of using this function would be greatly appreciated.
I'm using custom code in an expression to calculate the median of a column. It works fine up to a point. Like if there are 35 rows in the result set (or up to some number) but when it gets bigger results, like 42 rows or more it doesn't work, the median is -1. This is the custom code I'm using (found online).
I don't see anything limiting the count, but it comes back with a -1 median so I think that means the count is not > 0.
I have a column in the report called arrival_to_complete which is like: 53 min
I create a column with expression: =MAX(Code.AddValue(Val(Fields!Arrival_to_complete.Value))) to fill the array using just the number part of the column. Then in the report I have 'Median =' <expression>, where the expression is: =Code.GetMedian() I run the report with 2 parameters a begin date and an end date. I don't see where any of this should be limiting the median calculation so I don't get why it works sometimes and not other times.
Dim values As New System.Collections.ArrayList Function AddValue(newValue As Decimal) If values is Nothing Then values = New System.Collections.ArrayList End If values.Add(newValue)
what security measures should I take to restrict access on sql server 2005 from LAN and WAN. I am using local Ip address to connect Sql server. Security measure should be so strong that unauthorized user can not access my database.
Hi, I would like to create a report on a cube with Report Server (Query Builder) with one dimension in columns and the "measures" dimension members in rows:
Jan Feb Mar ... Measure1 10 12 14 Measure2 20 22 24 ..
How to create with either Tabular or Matrix report type?
The table has 5 columns. They are S1,S2,S3,S4 and M
I need the best way to calculate the MEDIAN for each row and store it in M. i.e. M=median(S1,S2,S3,S4)
I've come across articles where they've calculated medians on table rows, not table columns. But my requirement involves table columns. I guess transposing the columns into rows and then calculating median should be possible, but if I do that for 10000 rows using a cursor, then it would take a loooooong time.
I made a number of dimension and calculated member mods and notice that all now no base or calculated measures display values, they just show blanks in the browser and query window. To try to isolate, I've (1) removed every dimension and calculated member (2) verified there are no defaultmembers for dimensions (3) verified there are no dimension attributes set to IsAggregatable = False
(4) verified there are no deploy or script errors (5) fully processed every dm and fact (6) verified there are dim and claim records loaded with values in all appropriate columns
When I process the cube, it shows that rows are read, etc... All that looks normal. Just when I browse or query, all measures display as blanks or nulls.
What could cause this behavior? Any ideas on how to futher isolate? I can go to a backup but very concerned that this can happen with no error messages or warnings, so I want to find the cause.
============================ ALTER proc [dbo].[sp_CalculateMedianTimeInDepartmentMinutes]
@StartDate date ,@EndDate date as --== Check if count is even or odd declare @modulo int select @modulo = (Select COUNT(*)%2 from ED_data where AdmitDateTime between @StartDate and @EndDate ) --=== Get Median
[Code] ....
My fellow developer is using this code to calcuate a madians in many columns (see below). The problem is that it takes about 2 minutes to execute this code. Is there a way to reduce the time of execution?
I attach also a sample of the view
============== ALTER PROCEDURE [dbo].[sp_ED_Measures] @StartDate date, @EndDate date, @Hospital varchar(5) AS BEGIN SET NOCOUNT ON;
I have a cumulative measure in Tabular, and when I filter by a date in SQL it brings back all rows up to that date. However, when I drill down on any of the numbers, it only brings back rows related to the filtered date, and not the cumulative rows. Is there any way round this at all? Major obstacle for me at the moment...
