Varchar type variable is defined but has no value : VARCHAR2 « Data Type « Oracle PL / SQL

Varchar type variable is defined but has no value


SQL> declare
  2      str  varchar2(50);
  3  begin
  4      Null;
  5  exception
  6      when others then
  7      raise_application_error (-20100, 'error#' || sqlcode || ' desc: ' || sqlerrm);
  8  end;
  9  /

PL/SQL procedure successfully completed.



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