Proc SQL expects a format name in the syntax, you could use a generic one like BEST. for numeric values. In order to remove a format from a variable, you can use Proc DATASETS.
proc datasets lib=work nolist;
Will the trick you suggest work for character variables? I have all sorts of airport codes, e.g. KBOS maps to 'Logan International ...', but
sometimes I just want KBOS, so that I can save that in a macro variable that I later use as an argument to a macro.
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