Answer / mallikarjuna

nodupkey deletes duplicate observations based on by
variable.
noduprec delete the duplicate observations if entire
observation is duplicate.

Answer / ramkgupta

simply to say nodup and noduprec checks values present in all variables in dataset from one record to next record where as nodupkey checks values present in only variables given in by statement not all variables in a dataset.

Answer / srinu

Hi,
As per my knowledge the key word is wrong in this question "ondup key". I know nodup and nodupkey and dupout.

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