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Can you tell me what this means? thanks

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Can you tell me what this means? thanks

%IF %SYSFUNC ( EXIST(MYLIB.CONTROLS)) = 1
%THEN %DO;
PROC DATASETS LIBRARY=mylib NOLIST;
DELETE CONTROLS;
RUN;
%END;
I'm a newer, I only know %SYSFUNC function for automatic macro variables likes sysdate9; how THATcan be used with A data file ((MYLIB.CONTROLS),
AND what means for EXIST?
THANKS A MILLION IN ADVANCE.
SASJUNIOR
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Posts: 82

Re: Can you tell me what this means? thanks

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