6 Replies Latest reply on Oct 24, 2017 10:41 PM by Deepak Rai

    Calculate MIN date with some spicy problems

    Justin Pulley
    Justin Pulley Oct 24, 2017 9:26 PM

      I have some duration date stuff I am working on, but in some very limited cases there are dates in the data (probably wrong, but we have to work with it for now) that are say step 4 in a process, but which have a date significantly before the first step.

       

      What I am trying to do is tell tableau that if the date for a step not named "step 1" has a date before that of step 1, I want you to use the date from step 1 as the start date, otherwise just use MIN([Start Date])

       

      I am pretty sure this is an LOD calc I am not getting right in my head.

       

      The generic data that should work is

       

      ProjectStepStart DateEnd Date
      P113/17/201512/14/2015
      P123/17/201511/17/2015
      P134/6/20156/25/2015
      P146/15/201511/27/2015
      P1511/2/201512/14/2015
      P2110/31/20147/30/2015
      P2210/31/20147/30/2015
      P234/16/20141/9/2015
      P2410/31/20147/13/2015
      P255/4/20157/30/2015
      P3111/14/20147/14/2015
      P3211/14/20147/14/2015
      P339/9/20141/23/2015
      P3411/14/20146/26/2015
      P355/30/20157/14/2015

       

      You can see where P2 and P3 Step 3 is "before" Step 1 which is not possible.  Given that some of this data is very old with no real ability to fix it easily, we are relegated to making anything that isn't step 1 with a date before step 1 have the same start date as step 1.

       

      appreciate the help on this.