Summary
Statements
BY by-variable;
identifies corresponding
observations in a master data set and a transaction data set. By-variable specifies
one or more variables to use with the BY statement.
MODIFY master-SAS-data-set transaction-SAS-data-set <UPDATEMODE=MISSINGCHECK|NOMISSINGCHECK>;
replaces the values
of variables in one SAS data set with values from another SAS data
set. Master-SAS-data-set contains
data that you want to update. Transaction-SAS-data-set contains
observations for updating the master data set.
The UPDATEMODE= argument determines whether missing values in the transaction data set overwrite values in the master data set. The MISSINGCHECK option prevents missing values in a transaction data set from replacing values ...
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