Hi, Just let you know that the drop option works in sas 9.3. data _null_; if 0 then set sashelp.class; dcl hash h(); h.definekey('name'); h.definedata('name', 'age'); h.definedone(); do obs = 1 to nobs; set sashelp.class nobs=nobs; h.add(); end; h.output(dataset: "work.class(drop=age)"); stop; run ; proc print data=class; run ; Obs Name 1 John 2 Alice 3 Henry 4 Joyce 5 Janet 6 Judy 7 William 8 Mary 9 James 10 Barbara 11 Carol 12 Ronald 13 Louise 14 Thomas 15 Alfred 16 Robert 17 Jane 18 Philip 19 Jeffrey Linlin
... View more