How would you delete duplicate observations?
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Answer Posted / srinivas
there 3 options to delete duplicate obs
1. nodup
2. nodupkey
3.noduprec
if a entire record is duplicated in sense we use nodup of
nodup rec in proc sort procedure.
proc sort data=dsn nodup/noduprec;
by var;
run;
if a variable is repeated not a entire record . this time
we use nodupkey
proc sort data=dsn nodupkey;
by var;
run;
ex; in a dataset empid is repeated then use this syn. and
the empid is used in by var statement.
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