pk1,pk2,content,sortable,sortable_with_nulls,sortable_with_nulls_2,text
e,b,e-b,47,0.040231673144616176,0.518963840987604,$null
c,b,c-b,47,0.19007877450229604,0.9255751654990827,$null
f,a,f-a,47,,0.9779444845768627,$null