Insert to table as select only some values

Question

Hi all,
I have those two table
Table ANAGUTEN
CODI_UTEN NOT NULL NUMBER(5)
NOME_UTEN NOT NULL VARCHAR2(30)
PASS_UTEN NOT NULL VARCHAR2(30)
Table RELAUTENPROF
CODI_PROF NOT NULL NUMBER(5)
CODI_UTEN NOT NULL NUMBER(5)
The problem is that only some records of ANAGUTEN are in RELAUTENPROF, but this is an error.
How can I insert into RELAUTENPROF only the record (the field CODI_UTEN) that are in ANAGUTEN and that aren't into Relautenprof.
Is there a single statment to do this. I wouldn't use a pl/sql procedure
Note: the codi_prof is always = 2
Thank's and sorry for the simple question
Paolo

Answer 1

Here's three, I can think of at least three more.
INSERT INTO relautenprof
SELECT 2, codi_uten
FROM anaguten
WHERE codi_uten NOT IN (SELECT codi_uten
                        FROM relautenprof)
INSERT INTO relautenprof
SELECT 2, codi_uten
FROM anaguten a
WHERE NOT EXISTS (SELECT 1
                  FROM relautenprof r
                  WHERE r.codi_uten = a.codi_uten)
INSERT INTO relautenprof
SELECT 2, codi_uten
FROM (SELECT codi_uten
      FROM relautenprof
      MINUS
      SELECT codi_uten
      FROM anaguten)John