\setrandom id \
  1 100 exponential 5.0
\set id \
  1 + (1021 * :id) % 100
-- do some stuff with it...
SELECT 
  -- next line is contains spaces and tabs
     					      
  -- one
1 + :id

  -- end of select 
;
-- one command
SELECT 1\; SELECT 2;
-- two commands
SELECT 3; SELECT 4;
-- one command
SELECT 5 UNION SELECT 6;
-- DO something
DO $$
  -- comment to ignore...
  DECLARE
    i INTEGER;
  BEGIN
    SELECT 1 INTO i;
    SELECT 2 INTO i;
  END;
$$;
-- DO something else
DO $stuff$
  BEGIN
    -- let us do something
    PERFORM 1;
    -- yes!
  END;
$stuff$ LANGUAGE plpgsql;
