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Posts Tagged ‘WEBI’

WEBI – How to display “Others” in country field based on Rank

Posted by Hemanta Banerjee on November 8, 2010


One of the frequent questions I come across is – I want to view the top 5, however I want everything else that is not in the top 5 to be placed in 1 bucket called others. I ran into the same question on the BOB board today and since it was simple enough here comes the solution.

Getting the rank within WEBI is quite simple using the RANK function. The syntax for the function is RANK(measure name; dimension name; top|bottom). For example of I wanted to find out the rank by sales I could define RANK([Sales Revenue], [City], top).

In order to make my life easier I have defined variable called Rank as shown below.

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I can use that in a report filter to get only the top 3 regions by Sales Revenue.

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Now to display all other regions I will use the WEBI function NOFILTER. This will return the total sales across all the regions irrespective of the filter. Using the formula below I can get the sales for all the regions that are not in top 3.

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By placing this in the footer of the table I can get the report to show the sales for others.

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Posted in BusinessObjects, WEBI | Tagged: , , | 2 Comments »

How to perform YTD (or any Period to date) design in the Universe

Posted by Hemanta Banerjee on November 5, 2010


Yet another post inspired by the BOBJ board. The idea is how to design a universe such that users could enter any date and get both the measure value for that period as well as YTD. Since we want to make it easy for adhoc users we need to do some design work in the universe to make it easy for the users performing adhoc analysis.

So I figured the easiest approach would be to define a separate set of measures for YTD similar to what I did for the YAGO computation in a previous post. So extending on the same example I followed a very similar approach and it turns out to be quite simple. All we need to do is make sure we are able to run multiple queries, once for getting the sales and another one that sums up the sales from the beginning of year to the selected date. So I know we have to define a separate context for the YTD sales, forcing the BI Server to automatically run 2 queries and join the results. That’s what I want to leverage.

1. To make my life easier in the universe I defined a separate reference table DATES_PERIOD that maps the date to its corresponding YTD start and end dates. This not only makes it simple, it also makes it possible for me use the same design for handling non standard calendars such as Fiscal calendar. Also if I want to do QTD or MTD instead of YTD I can use the same approach by just changing the start and end dates.

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In this table I have gone ahead and filled up the start and end dates for YTD for every date in the DATES_TABLE my calendar table.

2.  In my universe I first go ahead and define an alias for the fact table called YTD_SALES. Now instead of joining it to my DATES_PERIOD (date dimension) table I have joined it to my DATES_PERIOD table using a complex join as shown below.

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This ensures that I will always select all the sales from the time slice (start and end of YTD) rather than selecting a specific date. My universe is as shown below.

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In my universe my time dimension objects such as Date or Qtr are driven by the DATES_TABLE. So in order to tie everything up I have joined the DATES_PERIOD to the DATES_TABLE on the date. This ensures that when the user selects the date, the corresponding period will be selected from the DATES_PERIOD and the BI Server will return the sales that fall in that period. This is the key part of the design.

Now I can setup up the rest of the joins with the rest of the dimension tables.

3. Now I have to define a new context for YTD as shown below. This is needed to make sure that when the user selects from Sales and YTD sales they are sent as separate queries.

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After setting up the contexts I can define the YTD Sales revenue by pulling in the appropriate field from the YTD_SALES alias table.

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Now checking to make sure that the logic is OK. I define 2 queries, YTD Sales till Dec 31-2004 and the sales for 2004. If the logic is correct both should come out same and it does.

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Also I can pull them in the same query if I want. I know that there is a sale on 15-Mar-2004. Filtering on that date gives me both the sales value for that date as well as YTD sales.

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The reason I love this design is because very versatile and it can be used for any period to date. The only thing to note is that it will work only if the user selects a date. If the user selects a Qtr or Month then the YTD value will be garbage. If you want to prevent this then you can force the user to select a date using a prompt.

Posted in BusinessObjects, Period to Date Functions, Time Sliced, Universe, WEBI, YTD | Tagged: , , , , , , , | 1 Comment »

How to create start and end date prompt in WEBI report

Posted by Hemanta Banerjee on November 1, 2010


Ran into this question on the BOBJ board asking how to create a WEBI report which can prompt the user to enter the start and end dates for running a report. Seems quite simple and useful so here is the solution.

I am using the adventure works universe to illustrate the process. The query I have created is show below.

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Created a simple query which prompts the user to enter the year and months for analysis. Note that I will only allow the user to select a single year. If you want to do cross-year analysis then you would need to define a separate object in the time dimension as “Year-Month” which would allow the user to perform cross year analysis. When I run the report I get prompted to enter the year and months for the report.

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And the results are as shown.

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Posted in BusinessObjects, WEBI | Tagged: , , , , , | Leave a Comment »

 
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