I have a SSRS expression where I'm calculating and an average setup time, but because of multiple, and different, postings against each order I'm needing to only take the average setup times for unique orders. Because of the need for other parts of the report to include ALL postings I cannot group or filter out the multiple order postings anywhere but this single expression. So I have the following expression:
=AVG(iif(IsNumeric(Fields!Setup.Value), CDbl(Fields!Setup.Value), 0))
And I'm essentially needing the proper syntax for the above expression rewritten to...psuedocode incoming...
=IIf((Fields!Order_Number.Value) is unique), AVG(iif(IsNumeric(Fields!Setup.Value), CDbl(Fields!Setup.Value), 0), else nothing)
I'm pretty sure a CountDistinct clause will resolve this issue, but I'm having difficulty finding the proper syntax.
Add a column to identify a unique row for each order:
ROW_NUMBER() OVER (PARTITION BY YourOrderID ORDER BY YourOrderID) as RowNumber
Add a calculated field to your dataset. Let’s call it “FilteredSetup”:
=IIf(Fields!RowNumber.Value = 1, Fields!Setup.Value, Nothing)
Now you can refer to this new column in your report and it will aggregate correctly:
=Sum(Fields!FilteredSetup.Value)
Related
I am trying to find a way to use the Group By functionality to create a table where the numerator of a fraction is grouped both by column and row, and the denominator is grouped only by column.
Here's my existing expression:
=Round(Sum(Fields!Days_In_Step.Value)/CountDistinct(Fields!ID.Value),1, MidpointRounding.AwayFromZero)
When grouped by rows (groupName) and columns (month/year) the numerator (Sum(Fields!Days_In_Step.Value)) gives me good data, but the denominator (CountDistinct(Fields!ID.Value)) is also grouped by row (groupName) and I don't want that.
I have a SQL solution but am trying to do this entire within SSRS expressions, if possible.
edit
Sample Data:
It would look like this. The background is that these groupings are counts of days and the "all" are counts of tickets, so we are trying to see who is sitting on their tickets longer.
Here is a mock-up including a sample data set using a pivot table:
Edit 2
Here is a full sample data set:
https://docs.google.com/spreadsheets/d/1rYPMcrLNB-FZN64Fn2-y3FtnM2iQo2VMH7YTdfiVnKM/edit?usp=sharing
I need to group on month as well as year, and I do not want to see "Exclude" in the group rows, however they cannot be filtered out of the tablix without being removed from the overall population, which is required for the denominator.
Your problem is caused by the scoping of aggregate functions. When you use aggregate function they run under the scope where it is placed in the tablix by default. In your case Sum() and CountDistinct() functions are running in both row groups (Owner Group) and column group (Month Group).
Fortunately, you can specify the scope that you want your aggregate function computes the aggregation, simply add the group name in the function:
CountDistinct(Fields!ID.Value,"MonthGroup")
The whole expression is like this:
=Round(Sum(Fields!Days_In_Step.Value)/
CountDistinct(Fields!ID.Value, "MonthGroup"),1, MidpointRounding.AwayFromZero)
Replace "MonthGroup" by the actual name of your group in columns
group.
This is result using the sample data you provided:
I've used this expression to show you how it is produced:
=Sum(Fields!Days.Value) & "/"
& CountDistinct(Fields!Ticket.Value,"MonthGroup") & "=" &
Sum(Fields!Days.Value)/CountDistinct(Fields!Ticket.Value,"MonthGroup")
Note my column group is named MonthGroup.
UPDATE: Scoping multiple groups in CountDistinct function.
Firstly I am not filtering the dataset, I prefer hide the Exclude rows using the below expression in the Hidden property of the Row Visibility window:
=IIF(Fields!Group.Value="Exclude" OR Fields!Group.Value="-1",true,false)
To count distinct id grouping by Month and Year but not by Group you can create a child group below Month group as you can see below:
My group is called Group2 and I used this expression in the Group on textbox.
=Fields!End_Month.Value & "-" & Fields!End_Year.Value
It will create a group per every Month-Year combination. When you create the group it will be added as a column group so you will have to delete the row so you will be prompted if you want to delete the group and row or delete the row only. Delete only the row leaving the group.
Now the expression you have to use is
=Round(Sum(Fields!Days.Value)/CountDistinct(Fields!ID.Value, "Group2"),1,MidpointRounding.AwayFromZero)
Replace Group2 by the name of the created group in your case.
This is the whole recreation of your scenario:
Let me know if this helps.
I have table orders with fields id, customer_id and amt:
SQL Fiddle
And I want get customer_id with the largest amt and value of this amt.
I made the query:
SELECT customer_id, MAX(amt) FROM orders;
But the result of this query contained an incorrect value of customer_id.
Then I built such the query:
SELECT customer_id, MAX(amt) AS maximum FROM orders GROUP BY customer_id ORDER BY maximum DESC LIMIT 1;
and got the correct result.
But I do not understand why my first query not worked properly. What am I doing wrong?
And is it possible to change my second query to obtain the necessary information to me in a simpler and competent way?
MySQL will allow you to leave GROUP BY off of a query, thus returning the MAX(amt) in the entire table with an arbitrary customer_id. Most other RDBMS require the GROUP BY clause when using an aggregate.
I don't see anything wrong with your 2nd query -- there are other ways to do it, but yours will work fine.
Some versions of SQL give you a warning or error when you select a field, have an aggregate operator like MAX or SUM, and the field you are selecting does not appear in GROUP BY.
You need a more complicated query to fetch the customer_id corresponding to the max amt. Unfortunately SQL is not as naive as you think. Once such way to do this is:
select customer_id from orders where amt = ( select max(amt) from orders);
Although a solution using joins is likely more performant.
To understand why what you were trying to do doesn't make sense, replace MAX with SUM. From the stance of how aggregate operators are interpreted, it's a mere coincidence that MAX returns something that corresponds to an actual row. SUM does not have this property, for instance.
Practically your first query can be seen as if it were GROUP BY-ed into a big single group.
Also, MySQL is free to choose each output value from different source rows from the same group.
http://dev.mysql.com/doc/refman/5.7/en/group-by-extensions.html
MySQL extends the use of GROUP BY so that the select list can refer to
nonaggregated columns not named in the GROUP BY clause.
The server is free to choose any value from each group, so
unless they are the same, the values chosen are indeterminate.
Furthermore, the selection of values from each group cannot be
influenced by adding an ORDER BY clause. Sorting of the result set
occurs after values have been chosen, and ORDER BY does not affect
which values within each group the server chooses.
The problem with MAX() is that it will select the highest value of that specified field, considering the specified field alone. The other values in the same row are not considered or given preference for the result at any degree. MySQL will usually return whatever value is the first row of the GROUP (in this case the GROUP is composed by the entire table sinse no group was specified), dropping the information of the other rows during the agregation.
To solve this, you could do that:
SELECT customer_id, amt FROM orders ORDER BY amt DESC LIMIT 1
It should return you the customer_id and the highest amt while preserving the relation between both, because no agregation was made.
I have an SSRS Report, in the database there is a column by name Total_running_hours.
There are more than one record for a single Cycle_number like more than 1 row with same Cycle_number but different Block_numbers and the value in Total_running_hours field will be same for all the rows with same Cycle_number. Eg. 1 Cycle number with 4 diff block_numbers contain same Total_running_hours for all 4 rows.
Now the problem is, in the group footer if I put this field then it will show the Total_running_hours value only once which is correct, but my final requirement is,
I need to get the sum of this field in the Report footer which need to display the sum group wise. No matter how many rows are there for a single Cycle_number it has to take only once and display the result.
I tried in different ways like
=sum(ReportItems!textbox204.Value) // name of text box in Group footer
Error: Report item expressions can only refer to other report items
within the same grouping scope or a containing grouping scope.
=sum(Fields!total_running_hours.Value,Group_name)
Error: The scope parameter must be set to a string constant that is
equal to either the name of a containing group, the name of a
containing data region, or the name of a data set.
Can any one please help me in getting the sum Group wise
Thank you in advance.
I found solution for this Problem.
We cannot simply sum the Total_Running_hours value as this would give us duplicates and the incorrect answer. We cannot sum the reporting services group as it goes out of scope
There is no SUM DISTINCT available in Reporting Services 2005 so we can't get the distinct value that way.
Since the query may not return a particular Cycle_Number Type we cannot use that as a filter.
The solution found was to add a column of the row number within a windowed set partitioned by the Cycle_Number like this
ROW_NUMBER() OVER (PARTITION BY Cycle_Number ORDER BY Cycle_Number ) AS 'RowNumber'
Then in the reports’ footer total column we put an expression that only takes the first row’s value to sum and converts all other rows to zero in that windowed set.
=SUM(IIF(Fields!RowNumber.Value=1,Fields!Total_Running_hours.Value,0))
After using this if u found any error in textbox like #Error
Then try this
=SUM(IIF(Fields!RowNumber.Value=1,CDbl(Fields!Total_Running_hours.Value),CDbl(0.0)))
I'm using SSRS linked to MySQL by ODBC. My query sums the payment amount by customer, and sorts by amount desc. I want to use this to create a LeaderBoard in SSRS, showing the Rank, and only including the top 10 customers.
Option 1:
Do an additional query on my group query in SQL, adding the Row Number.
Option 2:
Add a calculated field in SSRS.
Option 1 seemed bulky, so started with Option 2; I added a calculated field to the dataset called "Rank", defined as =RowNumber("DataSet1")
I added a calculated field to the dataset called "Rank", defined as: =RowNumber("DataSet1")
But I got the following error:
The expression used for the calculated field 'Rank' includes an aggregate, RowNumber, RunningValue, Previous or lookup function. Aggregate, RowNumber, RunningValue, Previous and lookup functions cannot be used in calculated field expressions.
So, I then added it to the actual tablix, and I was able to get the Rank to show correctly.
(When I did this, it automatically added an extra column to my dataset.
I then wanted to filter the top 10 customers.
I first tried by "bottom 10" on this new field, but it didn't work. (Seems this field is all zeros in the actual dataset.)
I then tried by "top 10" on the payment amount, but received an error that the filter only supports Integers.
So I tried to convert the payment amount to Integer in MySQL, using CAST and Convert, but they don't support conversion to Integer, and SSRS didn't like 'SIGNED' or any of the other options.
I then started trying Option 1, which was building the query into MySQL.
I added:
SET #rank=0;
SELECT #rank:=#rank+1 AS Rank, ...
This works in MySQL, but I get an error when I paste that query into the report definition on SSRS.
Any ideas?
Rather than setting #rank=0 in a separate statement, try setting it in a subquery cross-joined to the main query - like so:
SELECT #rank:=#rank+1 AS Rank, ...
FROM (SELECT #rank:= 0) r
CROSS JOIN ...
I have a column name 'APPs % of total' and it requires two different data sets to be populated .This doesn't seem to work. Any tips will be appreciated. Thanks
=(Fields!AppQty.Value/Fields!AppQty.Value,"second dataset")
The problem is: how does SSRS know which row to pull from the second dataset to get the field? So you have to use aggregation or lookups:
Method 1: Simply aggregate at the current level
There's usually no need for a secondary dataset just for your sums. You can aggregate at the group level within the current dataset by using the following formula:
=Fields!AppQty.Value / SUM(Fields!AppQty.Value, "table1_Group1")
where table1_Group1 is the group where the data is summarised.
Method 2: Aggregate the entire dataset
Aggregate at the dataset level for the either the current dataset or a secondary one:
=Fields!AppQty.Value / SUM(Fields!AppQty.Value, "SomeDataset")
Method 3: Lookup the value from another dataset
You'll need a dataset that sums the values at a group level. You usually achieve this result using method 1 and grouping, but here for completeness. So, let's say you are grouping by DepartmentId, you would have a dataset that aggregates like so:
SELECT DepartmentId, SUM(AppQty) AS AppQty
FROM MyTable
GROUP BY DepartmentId
Then lookup the appropriate value for the department from the current row (in the current table's dataset):
=Fields!AppQty.Value / Lookup(Fields!DepartmentId.Value, Fields!DepartmentId.Value, Fields!AppQty.Value, "SummaryDataset")
So the Lookup matches the DepartmentId from this dataset with the DepartmentId in the SummaryDataset and returns the AppQty value.