As @LinusH pointed at, what you need is:
proc sql;
update sasuser.A as a
set cat1 = (select Category from sasuser.B where id=a.id);
quit;
(untested)
As @LinusH pointed at, what you need is:
proc sql;
update sasuser.A as a
set cat1 = (select Category from sasuser.B where id=a.id);
quit;
(untested)
Thanks , it worked.
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