Exposed Sum of Occurrence Numeric Data in Items
A column can be added to the Items Perspective that gives the sum of a numeric occurrence data field.
![](../../../__attachments/1346372571/sum%20walla%20rea.jpg?inst-v=0afdfd47-3bc6-4c62-adaf-adf72ef5899e)
Set up
In order to view the sum of an occurrence numeric data field, it is important to associate a Data Type (unit of measurement).
A user with administration rights will have to create the field in the Item Occurrence GUI.
![](../../../__attachments/1346372571/sum%20occurrence%20set%20up.jpg?inst-v=0afdfd47-3bc6-4c62-adaf-adf72ef5899e)
To view the value for a single occurrence, add the column via the column picker.
![](../../../__attachments/1346372571/occrrence%20wall%20areA.jpg?inst-v=0afdfd47-3bc6-4c62-adaf-adf72ef5899e)
To view the sum total of the occurrences as a column in the item perspective, add the column via the column picker.
![](../../../__attachments/1346372571/Sum-wall%20area.jpg?inst-v=0afdfd47-3bc6-4c62-adaf-adf72ef5899e)