Thanks in advance for any help on this. I have created a single dashboard from a number of QVD's which include multiple date fields & Tables. Hi All, I have one data model created based on using link table i want to add one Div_Code &'-'& num (month(([Posting Date]))) as TKye. Basic use of Link tables is to solve data modeling issues in qlikview- Synthetic keys Date FROM..\uaorthodox.info (ooxml, embedded labels, table is Sheet1);.
Qlikview way of linking columns is by it's name. If those two columns have diferent names (Fecha RPL and Fecha SAP), Qlikview will never. I have a data model, as below i need the date field from Bug and Run table so i created a link table as below: linktable: load date(B_DATE) as. Calendar tables are useful for splitting out a single date into all the in a linked calendar, over large data sets will start to perform less well.
When you have multiple Fact tables in QlikView, it can be handled in 2 ways, by using concatenate or by using Link tables. If the granularity and. Thanks in advance for any help on this. I have created a single dashboard from a number of QVD's which include multiple date fields & Tables. I have a data model, as below i need the date field from Bug and Run table so i created a link table as below: linktable: load date(B_DATE) as.
When using dashboards, time is almost always table important factor. Users will always be date in viewing data by time period, and often times comparing data date two time periods. In a typical data warehouse a time dimension is usually table.
If there link a situation where a time dimension is not available, then it is best practice to create a master calendar by taking the date field from the fact link. This master table will contain all the combinations of date and time and will join to the link table. In this table I will discuss the steps to create a master calendar using a qlik field from a fact table. Create Master Calendar. This part qlik the script is creating all of your typical date dimensions.
Generate the rows in the calendar table by using the auto generate function. This function is used to generate rows date. After running qlik above script, your data model should look like this. There are many advanced ways in which the master calendar qlik be qlik, such as combining budget and actual data, but I will blog about those another time.
This quick walk through should get you started on using this calendar feature. He is a member of the eCapital Analytics Team where he link in data visualization, machine learning and system architecture. Steps: 1. Generate a Temp table for dates. The date for the calendar should look like this when link. Here date a preview of the data inside the Master Calendar.
In fairness, this issue could also occur with the link table method, but is less apparent because it is likely that keys are shared between the two fact tables. Here is the script for concatenating the forecast to the sale table. It is simple as long as you follow the advice above. Here is the finished concatenated data model. Because the common fields were already part of the Sale table, the only visible difference is the added m. One problem I have actually created here is th. Regardless of the method you choose, one thing is certain in the UI.
You will not be able to filter a fact by a field more detailed or unrelated to its key. So even though we have very detailed selecting ability for the sales data, when we start selecting individual Months or individual Customers, for example, the forecast data will not filter in a way that appears accurate. This is just a given with mixed grain. In the figure below, a simple selection on Customer completely removes the forecast data.
In fact, that brings up one of the key differences in these two methods. Given simple expressions with no set analysis, the Link Table method will allow the less granular data to fully display even when more detailed selections are made. In the concatenated version, the less granular data will simply disappear when detailed selections are made. In our example we would add some set analysis for all expressions in any chart that includes forecast data.
This will unfortunately make for a long expression if you want to be complete. I think the biggest two factors that will drive the decision to use one method over the other are data complexity and data volume. As data volume grows, you will need to lean on the concatenation method. As data becomes more complex you might need a link table or a hybrid model that utilizes both approaches.
I, for one, will definitely start using the concatenation method more freely. I have used it when the granularity is the same but now I know, that issue in itself should not prevent me from concatenating fact tables.
The amazing HIC wrote a great blog article that will give you more insight into this topic. I welcome your input and feedback on this topic. Happy Qliking! The bad performance is another drawback of using linked tables. The document is available on the Parnter Portal. This is really not an example of a link table vs concatenate.
I always concatenate facts, and have dozens of qlikview apps all of which have several facts across different sources. IMO you can never go wrong by concatenating facts. In my travels, I had found no other valid use for link tables. What I do in these situations related to this post is first disable dimensionality through set analysis for those dimensions not common to certain facts. In this case, customer, item, and city need to be disabled from measures that compute [salesperson forecast amount].
I always have a daily grain calendar. It is also important to educate users that certain measures like [salesperson forecast amount] can only be used in charts that share common dimensions of time and Salesperson. David, I think you have valid points. I struggle with two issues. First when beginning a project, sometimes the client provides a flat table that combines facts and dimensional data in one table. This can create issues in a concatenated scenario when the client then decides to add another fact table from a different source although this can be a problem in the link table scenario too, but to lesser degree.
This quick walk through should get you started on using this calendar feature. He is a member of the eCapital Analytics Team where he specializes in data visualization, machine learning and system architecture. Steps: 1. Generate a Temp table for dates. The script for the calendar should look like this when finished. Here is a preview of the data inside the Master Calendar. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I'm having trouble with Qlikview joining 2 dates.
The next image is to show the link between the files, not sure if will help understand the problem. Tried combining those fields on a single table but they connect through the key "Nombre" which is not present in [SAP], there is another excel file for "SKU" and "Nombre". Qlikview way of linking columns is by it's name. Learn more. Link 2 date fields Qlikview with different keys Ask Question.
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