Modify a non-indexed master data set in place with transactions supplied in a second data set. Add and delete observations from the master data set. Match the two data sets by variables in common that uniquely identify the observations. The transaction data set can contain duplicate BY values of the variables in common while the master data set does not.
|Featured Step||DATA step|
|Featured Step Options and Statements||MODIFY and BY statements
_IORC_ automatic variableMacro function %SYSRC
|A Closer Look||Controlling When the MODIFY Statement Outputs an Observation Handling Missing Values When Using the MODIFY and BY Statements|