Many Base SAS procedures require an input SAS data set. You specify the input SAS
data set by using the DATA= option in the procedure statement, as in this example:
proc print data=emp;
If you omit the DATA= option, the procedure uses the value of the SAS system option
_LAST_=. The default of _LAST_= is the most recently created SAS data set in the
current SAS job or session. _LAST_= is described in detail in the SAS Data Set Options:
Reference.
Threaded Processing for Base SAS Procedures
Threaded processing enables multiple pieces of executable code to run simultaneously.
Many SAS procedures, including several SAS/STAT ...
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