pk1,pk2,content,sortable,sortable_with_nulls,sortable_with_nulls_2,text
a,d,a-d,78,,,$blah
c,d,c-d,29,0.30928466220865325,,$blah
f,d,f-d,60,,0.4408231901628116,$blah
h,d,h-d,-15,0.08150198744788395,0.6560547180360552,$blah
b,d,b-d,-88,,,$null
d,d,d-d,-97,,0.43352340132584843,$null
e,d,e-d,-59,0.3298036635789654,0.4004522548136564,$null
g,d,g-d,84,0.051446079972376046,,$null