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Proc compare is most valuable tools which are used in comparing the two different dataset or same dataset. Mostly used in clinical trials industry. Original data is known as base data which are used as reference in which comparison data are measured. We can compare more than two datasets also.

PROC COMPARE generates the following information about the two data sets that are being compared:

1.whether matching variables have different values

2. whether one data set has more observations than the other

3. what variables the two data sets have in common

4. how many variables are in one data set but not in the other

5. whether matching variables have different formats, labels, or types

6. a comparison of the values of matching observations.

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