SAS code Proc rank with groups option to SQL conversion

Question

I am new to SAS and struggling to convert the below piece of code to SQL.

proc rank data = input (where = (limit_assort = 1)) out = assort_rank  groups=3;
    var assort;
    ranks assort_rank;
run;

I tried in sql by using the below one but not matching with the SAS output.

Percentile_Cont(0.3) Within Group (Order by assortment) As assortment_rank

In SAS output, i can see a column "Rank for variable assort"with 0,1&2 based on the groups=3 option. But not sure how to handle it in SQl.

Thanks in advance!