Deneb Sorting Issue when "Datum" is included

Hi dm-p  ,

Thank you very much for the help, 

I had to modify the code like below from your code, to get the output for my requirement. And I have commeneted the aggregated part inorder to make my legend working, else its showing as "Undefined" for "Target" bar. And I had to remove "SortOrd" field from visual otherwise the datum bar is coming at starting in the chart instead of end. The trick for my requirement was to use sort: {"op":"min"} in the encoding.

{
  "data": {
    "name": "dataset"
  }
    ,
   "transform": [
    {
      "filter": "datum['Sum Of Price'] != null "
    }
  ]
  ,

  "layer": [
    {
      "mark": {
        "type": "bar",
        "tooltip": true
      }}
     ,


   {
    
    
      "mark": {
        "type": "bar",
        "tooltip": true
        
      },
      "encoding": {
        "x":{"datum":"Target","type": "nominal"},
        "y": {
          "aggregate":"min",
          "field": "Target_m",
          "type": "quantitative"
        }
      }
    }
  ]
 ,
  "encoding": {
        "x": {
          "field": "MonthYear",
         "sort":{"field":"SortOrd","op": "min"
          },
          "type": "nominal"
        },
        "y": {
          "field": "Sum Of Price",
          "type": "quantitative"
        },"color": {"field":"Product"}
      } 
}

Thanks Again,

Vamshi.