pk1,pk2,content,sortable,sortable_with_nulls,sortable_with_nulls_2,text
a,b,a-b,51,,0.6020187290499803,$null
a,s,a-s,53,0.3241560570046731,0.8787218778231842,$null
a,i,a-i,55,,0.3794554417576478,$null
a,r,a-r,60,0.6389494948660052,,$null
a,a,a-a,63,,0.7364712141640124,$null
a,c,a-c,83,,,$null