topic Re: Chart based on latest data in QlikView

Chart based on latest data

Thu, 06 Feb 2014 13:18:51 GMT

Hi,

Need to display the latest data based on date and other dimensions.

I need to show the latest stock available in the stores. Need to plot a chart with store in X axis and latest stock information(Based on the date) for that store in y axis.

Data:

Date Store, Product, Stock

1-Jan, A, P1, 100

2-Jan, A, P1, 70

2-Jan, A, P2, 20

1-Jan, B, P1, 20

1-Jan, B, P2, 10

My chart should like like below

Store, Stock

A, 90

B, 30

Pls Suggest some solutions.

Re: Chart based on latest data

jonathandienst — Thu, 06 Feb 2014 13:28:35 GMT

For best performance, I would calculate a flag field in script to mark the latest value by store:

T_MaxDates:

LOAD Max(Date) As MaxDate,

Store

Resident Data

Group By Store;

Join(Data)

LOAD Store,

MaxDate

Resident T_MaxDates;

Join(Date)

LOAD Store,

Date,

If(Date = MaxDate, 1, 0) As LastDateFlag

Resident Data;

DROP Table T_MaxDates;

Then your chart expressions become simple (and fast):

=Sum({<LastDateFlag = {1}>} Stock)

HTH

Jonathan

Re: Chart based on latest data

Fri, 07 Feb 2014 06:42:26 GMT

Hi Jonathan,

Your solution works fine. But I have to find the latest date flag for many dimesional level. Is there any way to do it in chart expression itseslf?

Something like

firstsortedvalue(aggr(sum(Stock),Store,Date),-Date)...

Re: Chart based on latest data

Fri, 07 Feb 2014 07:02:55 GMT

take Date from store table store in variable

like vLatestDate =max(Date)

pass this in chart using set analysis

Re: Chart based on latest data

kiranmanoharrode — Fri, 07 Feb 2014 07:09:14 GMT

Dear Shanti,

Create 1 variable vMaxDate

= Max(Date)

make Bar Chart

Take Dimension as a Store

And try below Expression

=Sum({<Date={"$(vMaxDate)"}>}Stock)

Regards
Kiran Rode

Re: Chart based on latest data

Fri, 07 Feb 2014 10:46:32 GMT

We cannot use a variable as it will always show the maximum date of the stock available irrespective of the Store. For each store the maximum date will vary. So we have to do find out the maximum date for each store to get the latest stock information

Re: Chart based on latest data

er_mohit — Fri, 07 Feb 2014 11:41:42 GMT

Try this

FirstSortedValue(Aggr(sum(Stock),DATE,Store),-Aggr(max(DATE),Store))

Re: Chart based on latest data

Fri, 07 Feb 2014 14:48:08 GMT

Hi Shanthi, You can't use the set analysis here because set analysis is calculated not row by row.

The Best method is create the script level suggested by Jonathan