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CONTENTS statement
displays information
about a data set, including the names and attributes of all variables.
This information reveals any problems that you might have when you
try to concatenate data sets, and helps you decide whether to use
the SET statement or PROC APPEND. For more information
about using the CONTENTS statement in the DATASETS procedure, see Chapter 16, “DATASETS Procedure” in Base SAS Procedures Guide.
END= statement option
enables you to determine
when SAS is processing the last observation in the DATA step. For more information,
see Conditionally Processing Observations from Multiple SAS Data Sets.
IN= data set option
enables you to process
observations from each data set differently. For more information ...
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