pk1,pk2,content,sortable,sortable_with_nulls,sortable_with_nulls_2,text
g,x,g-x,65,0.8552933714560903,0.3844824765824649,$null
f,y,f-y,29,0.09917846167904198,0.6547129575231422,$null
g,y,g-y,15,,,$null
b,z,b-z,-93,,,$null
c,z,c-z,-58,0.9637347441012087,0.11453287137889767,$null
f,z,f-z,10,0.4515549159652815,0.3987301842569533,$null
g,z,g-z,15,0.10350187727039162,0.08432913202456382,$null