#TABULO ATTRIBUTE HOW TO#
#TABULO ATTRIBUTE FULL#

#TABULO ATTRIBUTE HOW TO#

In our Tableau Specialized Visualizations half-day training course, we discuss when and how to use the ATTR function. Remember, if you have blended data sources, you must use ATTR as all values in a blended calculation will be aggregated. This is but one of the many uses of the ATTR function.

We can leverage this information and dig deeper into the data. While this doesn’t tell us how many customers are assigned to the given order number, nor their names, it does provide us with a starting point for our investigation. This tells us that ATTR was unable to return only one row for that Order ID.

As anticipated, we do see Order ID CA-2011-100762 shows an asterisk ( *) for the customer name whereas all other columns return a single value.

To test our hypothesis of order numbers being re-used, we will add our new Customer Name (ATTR) measure to the rows shelf to the right of Order ID.

Hover over the Order ID column on the visualization and click the Sort icon to sort this column ascending by Order ID.

Add Sales to the Text Here, we see the aggregated amount for each order by Order ID. Any field that is or can be aggregated will show up under Measures. This is because ATTR is an aggregate function. Notice that this field has now moved from the Dimensions pane to the Measures pane. In the expression editor, wrap the Customer Name field with the ATTR function:

Right-click the new Customer Name (ATTR) field and select Edit.

Begin a new worksheet and in the data pane, right-click Customer Name and select Duplicate.

You would need to edit your version of the file in a similar fashion for this to work. This version of US Sample Superstore has been modified to have a row with duplicate values. This exercise starts with Tableau being open, US Sample Superstore as the data source and the Orders sheet being brought in on the data page. We will open up Tableau 10.2 and work through the steps for this exercise. Using the same logic as above, we can see if an Order Number has been incorrectly assigned to multiple customers. It can also be used directly on a visualization to see if there is a unique value or multiple values returned for a row. This calculated field can be used as a filter to help reduce bad data. In this scenario, when there is one and only one customer ID returned, our expression will be true. This can be very useful when checking for duplicates in blended data sources such as looking for duplicate CUSTOMER_ID values: If the value of the expression has multiple values, show an asterisk. To simplify, if the value of the expression is only one returned value, show that value. Whew! That’s a lot to take in from a single four letter function! At its core, the function is performing the following test: It also can be used to test a value to determine if there is more than one response returned. You may need to use it when creating calculated fields across blended data sources, for example. Let’s begin with what it is: the ATTR() function is for the aggregation of dimensions to turn them into measures. Most of them start off with “What is it for?” In this post we hope to explain exactly what it is, why you need it and the practical application of this misunderstood, yet powerful, function. We get a number of questions each week around the proper use of the ATTR() function.

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#TABULO ATTRIBUTE FULL#

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