I am trying to use a MAX function inside WHERE clause on Qlik Sense.
I have charged a calendar and I have to make the sum of a specific value filtering it by max month of the max year specified. If I do the following statement separately:
Max({<Year={"$(=max(Year))"}>}Month)
it shows me correctly the max month of each row.
Instead of this, if I try to use this filter to filter my value it shows me only null values. This is the expression that I am using by the moment:
Sum({<Month=Max({<Year={"$(=max(Year))"}>}Month)>}Import)
How can I filter by month of the last year specified?
Thanks in advance!
There's two thing that needs to be added for your expression to work: The dollar expansion for the whole max expression and an outer expression for the year (unless you want to sum for all months x for all years, where x is the largest month of the latest year)
sum({< Month = {"$(=max({<Year = {"$(=max(Year))"}>} Month}"},
Year = {"$(=max(Year))"} >} Import }
Related
I am having trouble with a task in Tableau. I need to pull in a value for each month, but the value originates in the following month (month + 1). For example, in January, I need to pull a beginning value from February, and then in February I need to pull a beginning value from March. The idea is to take the beginning value from the following month to calculate the difference from the ending value from the current month. The data I have is snapshot based, so there is one column which is the Date column, which can be 1/1/2020, or 2/1/2020 etc. (its done by month, not days).
My instinct is to create a calculated field and say something along the lines of 'where snapshot = snapshot (current) + 1 month, take in this value' but that does not work because they are not equal. I need to create a separate column or LOD for the future month I think? or a parameter?
ex.
{fixed [date], [ID]: SUM( [Date] = Dateadd('month',1,[Date]) Then [Begin Value] End)}
I found the answer. I needed to use the LOOKUP() function.
I have a date column which I am trying to query to return only the largest date per month.
What I currently have, albeit very simple, returns 99% of what I am looking for. For example, If I list the column in ascending order the first entry is 2016-10-17 and ranges up to 2017-10-06.
A point to note is that the last day of every month may not be present in the data, so I'm really just looking to pull back whatever is the "largest" date present for any existing month.
The query I'm running at the moment looks like
SELECT MAX(date_col)
FROM schema_name.table_name
WHERE <condition1>
AND <condition2>
GROUP BY EXTRACT (MONTH FROM date_col)
ORDER BY max;
This does actually return most of what I'm looking for - what I'm actually getting back is
"2016-11-30"
"2016-12-30"
"2017-01-31"
"2017-02-28"
"2017-03-31"
"2017-04-28"
"2017-05-31"
"2017-06-30"
"2017-07-31"
"2017-08-31"
"2017-09-29"
"2017-10-06"
which are indeed the maximal values present for every month in the column. However, the result set doesn't seem to include the maximum date value from October 2016 (The first months worth of data in the column). There are multiple values in the column for that month, ranging up to 2016-10-31.
If anyone could point out why the max value for this month isn't being returned, I'd much appreciate it.
You are grouping by month (1 to 12) rather than by month and year. Since 2017-10-06 is greater than any day in October 2016, that's what you get for the "October" group.
You should
GROUP BY date_trunc('month', date_col)
As you can see from the picture above I am trying to add new column and to calculate the difference between =2014-2017.
Is there any way to make this because Tableau's option "Table Calculation" doesn't play role for me.
Working out the difference between the first and last periods with table calculations:
First you need to get minimum year's values (i'm calling the field "Min Year Select"):
IF DATETRUNC('year',[Order Date]) =
{FIXED: MIN(DATETRUNC('year',[Order Date]))}
THEN 1 END
The above field named Min Year Select is saying that it should return a 1 if the year of the order date is the minimum year in your date range
Now we are flagging the smallest years, we can create a field to get the values (i'll call this "Min Year Segment"):
IF SUM([Min Year Select]) >= 1 THEN [Sales] END
Here we're saying that if the year is flagged as the smallest (as classified by the previous calc field we made), then get the value
But before we can compare the two values, you have to work out the number of time periods between the min and current year so that the difference calculation lookup field is comparing the right values (i'll call this "Number Years in Range"):
{FIXED [Segment]: COUNTD(DATETRUNC('year',[Order Date]))}
What we're doing is fixing the query at the category level (segment), think of this as removing the date pill from your report, then performing a calculation. Here it's COUNT DISTINCT years. So if a segment has data for 2011,2012,2013; then the query returns 3
We can now get the difference between your latest and your minimum Segments (called: "Difference from First Last Segment"):
[Segment] -
LOOKUP([Min Year Segment],
-1*(Number Years in Range)-1)
Firstly we get the first year's sales for each segment (Min Year Segment will be null for all years that aren't the first, so we need to lookup the first by going backwards by the number of years in our range:
We do -1 * because we want the lookup to lookup backwards, then we add in ("Number Years in Range" - 1) because we want to lookup to the period that had the earliest data. We do minus one so we're excluding the current year/latest year in your dataset
This is a lot to digest, I think it's easier to present as a picture too:
Here we calculate the difference between the first and last month, with the value in the last month
If this helped or you have any more questions, please vote on my answer/let me know
My sheet has measure names divided by ops managers and managers filtered to show values only for current week. What I need is to make new column for each of the measures to show values for previous week and then make %diff. I have seen solutions by putting week in row but is it possible this way somehow?
What I tried:
LOOKUP(sum([missed hours]),-1) (shows values from previous row)
{ FIXED DATEPART('week',[metric_date]),[ops_login_name],[supervisor_login_name]:sum([missed hours])} does nothing, same values as normal
I even tried separate calc field DATEPART('week',[metric_date])-1 that shows previous week number and then { FIXED [previous_week],[ops_login_name],[supervisor_login_name]:sum([missed hours])}
You can do this by filtering for the desired week in the Measure Value and not in the filter shelf. Create two boolean expressions that isolate your week.
Is this week? : datetrunc('week',{max([metric_date])}) = datetrunc('week',([metric_date]))
Is last week? : dateadd('week',-1,datetrunc('week',{max([metric_date])})) = datetrunc('week',([metric_date]))
Then create week specific measure values with sum(if [Is this week?] then [total_miss_cnt] end)
Repeat for previous week and then you can do a % diff. Make sure to remove and date filtering from the filter shelf.
I need to filter my query with different time intervals like that:
...
where
date >= '2011-07-01' and date <='2011-09-30'
and date >='2012-07-01' and date >='2012-09-30'
I suppose such code is not good, because these dates conflicts with each other. But how to filter only these two intervals, skipping everything else? Is it even possible? Because if I query like this, I don't get any results.I tried to use BETWEEN, but it does same thing.
I bypassed this by extracting quarters from years and calculating only third quarter. But then other quarters sum is showed as zero and I can't ignore these rows that have sum column with zero value. I tried to filter where price > 0 (column where sum goes), but it says that column do not exist. So I put it whole FROM under '('')' brackets to make it calculate sum before where clause, but it still does give me error that such column do not exist.
Also if you need to see query I have now, I can post it, just tell me if it is needed.
I want to do this, because I need to compare third quarter of two different years (maybe I should use another approach).
You're not going to get any results because you can't have a date that's both within 7/1/2011 through 9/30/11 and after 7/1/2012 and after 9/30/12.
You can have a date that is either between 7/1/20122 and 9/30/2011 or between 7/1/2012 and 9/30/2012.
SELECT col1 FROM table1
WHERE date BETWEEN '7/1/2011' AND '9/30/2011' OR date BETWEEN '7/1/2012' AND '9/30/2012';