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Trying to create a calculated column in a List in SharePoint2013 Online based on 2 other columns that get values from another Lookup table(having a text column). So now my List looks:

  • Title Planned Original Difference

  • Proj1 2016W52 2016W51 1

  • Proj2 2017W1 2017W4 -3

  • Proj3 2016W52 2017W1 -1

The Difference = PlannedWeek- OriginalWeek. What formula could i apply to the calculated column in such a scenario.

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SharePoint doesn't allow Lookup column to be part of the Calculated Column formula . so you can't directly do this, instead you can create a List Workflow using SharePoint designer which will run when an item is changed or created and update the lookup column value to another custom column.

and this custom column can be used in the calculated columns formula.

here whenever the value in the lookup list for that column changes it doesn't get updated to the custom column. it needs to be taken care.

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  • Thanks Esaki. I am quiet new to workflows. Could you tell me how to built that step by step.
    – samve
    Commented Nov 20, 2016 at 16:50
  • A simple workflow to achieve this can be developed from SharePoint Designer please refer for the steps : msdn.microsoft.com/en-us/library/office/jj554671.aspx
    – Esaki
    Commented Nov 21, 2016 at 6:59

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