Postgres 2 queries in one?

Question

PostgreSQL

how to execute two requests with one request?

SELECT COALESCE(setval('techbase.item_id_seq', max(id)),nextval('techbase.item_id_seq'))  FROM techbase.item,
                    (SELECT 
                    nextval('techbase.item_id_seq')) as sel

Answer 1

SELECT setval('techbase.item_id_seq', max(id)+1) FROM techbase.item,
                    (SELECT 
                    nextval('techbase.item_id_seq')) as sel