Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

Unique Count and Unique Count to Date (MDX)

Posted on 2004-04-23
6
Medium Priority
?
623 Views
Last Modified: 2008-02-01
Hello, can anybody indicate the MDX to calculate Unique Count to date ?

Having two Periods

Period        Unique Count        Unique Count to Date
First            10                        10
Second        4                          Unique Count (First + Second)


So if 2 of the 4 items are contained in the first period, then the unique
count should be 10 + 2 = 12

Thanks in advance,
0
Comment
Question by:gflorez
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
6 Comments
 
LVL 4

Expert Comment

by:BulZeyE
ID: 10900660
are the periods signified by integers?  I need much more information.  Table structures, PK and FK please..
       
0
 

Author Comment

by:gflorez
ID: 10901021
This is just one large fact table and the date/period is defined as datetime type which is used to create a time dimension (year-week). Then I have an integer to find the unique occurences of an event within each week.


Date                            EventType
2/2/2003                       4
2/2/2003                       5
2/9/2003                       6                      
2/9/2003                       4
2/21/2003                     6                      


So going back to my question:

Date                     Count Unique for Period             Count Unique To Date
2/3/2003                    2                                                   2
2/9/2003                    2                                                   3
2/21/2003                  1                                                   3      

So for the week of 2/21/2003, the eventid # 6 was already counted for the week of 2/9/2003 so it should not be counted the next time it occurs.

Thanks


0
 

Author Comment

by:gflorez
ID: 10901325
Now, if it helps ... I can recreate the fact table from the following tables structure:

EventDesc                    Events

EventID                        EventID
EventStarts                  EventDate
Description                   EventLocation
                           

The PK is EventID, right now, there are many eventdates and I need to count only the first occurence in my cube.
0
 
LVL 4

Accepted Solution

by:
BulZeyE earned 2000 total points
ID: 10902238
Try this:

create table table1 (datefield datetime, eventid int)

insert into table1
(datefield, eventid)
select
'2/2/2003',                      4
union all
select
'2/2/2003',                       5
union all
select
'2/9/2003',                       6                      
union all
select
'2/9/2003',                     4
union all
select
'2/21/2003',                     6    

select t2.datefield,
       t2.datecount,
       count(distinct t1.eventid)
  from table1 t1
 inner join (select datefield, count(distinct eventid) datecount
               from table1
              group by datefield) t2
  on t1.datefield <= t2.datefield
group by t2.datefield, t2.datecount
order by 1

0

Featured Post

What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Why is this different from all of the other step by step guides?  Because I make a living as a DBA and not as a writer and I lived through this experience. Defining the name: When I talk to people they say different names on this subject stuff l…
A Stored Procedure in Microsoft SQL Server is a powerful feature that it can be used to execute the Data Manipulation Language (DML) or Data Definition Language (DDL). Depending on business requirements, a single Stored Procedure can return differe…
Via a live example, show how to set up a backup for SQL Server using a Maintenance Plan and how to schedule the job into SQL Server Agent.
Viewers will learn how to use the UPDATE and DELETE statements to change or remove existing data from their tables. Make a table: Update a specific column given a specific row using the UPDATE statement: Remove a set of values using the DELETE s…

636 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question