Difference between nodup and nodupkey Difference between if and where

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nodup vs nodupkey: nodup removes duplicates based on all variables, nodupkey removes duplicates based on key variables. if vs where: if is used for conditional processing, where is used for subsetting data.

nodup removes duplicates based on all variables, while nodupkey removes duplicates based on key variables
if is used for conditional processing within a data step or procedure, while where is used for subsetting data based on a condition
Example: nodup vs nodupkey - nodup will remove all duplicate observations, while nodupkey will only remove duplicates based on specified key variables
Example: if vs where - if can be used to create conditional statements within a data step, while where can be used to subset data based on a condition

Difference between nodup and nodupkey Difference between if and where

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