Referencing subselect returned value - Mailing list pgsql-general

I'd like to reference values returned by a subselect in the same SELECT
query.

Example:

SELECT id,
  ( SELECT COUNT(*) FROM second ) AS value_to_reference,
  ( value_to_reference + 1 ) AS value_that_uses_referenced_one
FROM first;

Any suggestions?

Thank you,
Marco