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Answer Posted / nishant
PROC SQL is a powerful tool in sas which combines the
functionality of data and proc steps. PROC SQL can sort,
summarize, subset, join (merge), and concatenate datasets,
create new variables, and print the results
or create a new dataset all in one step!
PROC SQL uses less resources when compared to that of data
and proc steps.
To join files in PROC SQL it does not require to sort the
data prior to merging which is must is data merge
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