Explain the role of the USING phrase in the SORT statement when working with external sort files.
- Defining the sort criteria
- Identifying the output file
- Specifying the input files to be sorted
- Specifying the working storage area
The USING phrase in the SORT statement is used to specify the input files to be sorted. It provides the names of the external sort files and their associated SELECT clauses, allowing the SORT statement to access and sort the data from these files.
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