How to run an ad-hoc script in PostgreSQL?

Question

I\'m trying to run this in PostgreSQL 9.2:

RAISE NOTICE \'hello, world!\';

And the server says:

Error : ERROR:  syntax erro         


        

Answer 1

Use an anonymous code block:

DO language plpgsql $$
BEGIN
  RAISE NOTICE 'hello, world!';
END
$$;

Variables are referenced using %:

RAISE NOTICE '%', variable_name;