Use of the Count Distinct Function

[Brickinnit]

Hi All,

Hope all is well.

Sorry to bother you but have a quick question/need some advice.  I have a dataset where I want to calculate the distinct counts for a particular variable - see below:

Variable 1 = UNSUBID           Variable 2 = KITNUM

001001                                   4689

001001                                   4689

001001                                   4688

001001                                   4689

001002                                   5000

001002                                   5000

001002                                   5000

001002                                   5000

So, want to calculate the number of distinct counts by UNSUBID for variable KITNUM - so above, 001001 could have a distinct count of 2 for KITNUM (4689 and 4688), 001002 would have a distinct count of 1 for KITNUM (5000) etc.

I have looked on the forums and on SASHELP but cannot quite figure out how to do this (assume it's the count distinct that is required).

Again, thanks for looking and hope you can help 🙂                                 

[RW9 · Accepted solution]

Hi,

proc sql;

     create table WANT as

     select     distinct

                    UNSUBJID,

                    COUNT(DISTINCT KITNUM) as CNT

     from        HAVE

     group by UNSUBJID;

quit;

[stat_sas]

data have;
input UNSUBID  KITNUM;
datalines;
001001 4689
001001 4689
001001 4688
001001 4689
001002 5000
001002 5000
001002 5000
001002 5000
;

proc sql;
select unsubid,count(distinct kitnum) as cnt from have
group by unsubid;
quit;

[Brickinnit]

Thanks All!  Hopefully won't have to ask another dumb question in a while

Have a good day!