counts

[SASPhile]

ssn  pin    id
s1   p1     c1a
s1   p2     c1b
s1             c1c

s2               c2
s2              c2a

s3              c3
s3             c3a

s4              c4a
s4  p4       c4b

count where pin is missing with pin present for other records : 2 (ssn s1 and s4)

count where pin is not present all : 2 (s2 and s3 )

[art297]

proc sql;

  select sum(all_miss) as all_miss,

         sum(miss_count) as miss_count

    from

  (select count(pin) eq 0 as all_miss,

   count(pin) gt 0 as miss_count

    from have

      group by ssn

        having nmiss(pin) gt 0)

  ;

quit;