Duplicated records

Question

Dear friends,
One question for you from a PL/SQL beginner:
I have to individuate duplicated records (and set them as errated):
With the below code I retrieve only the plus records, but I need ALL the duplicated records (example, if I have 2 equal records, I need the 2 records, not only one)
SELECT
ID_AMBS
, ASL
, CD_PRESIDIO
, GGMM_CONTATTO
, NR_RICETTA
, CD_CONT_PRESCR
, NR_PROG_INT
FROM NOC_AMBS_WORK
WHERE ID_AMBS IN
    SELECT
    min(ID_AMBS)
    FROM
    NOC_AMBS_WORK
    GROUP BY
    ASL, CD_PRESIDIO, GGMM_CONTATTO, NR_RICETTA, CD_CONT_PRESCR, NR_PROG_INT
    HAVING
    COUNT (*) > 1
)With the below code I retrieve all the records of the table (not the duplicated)
       SELECT *
        FROM noc_ambs_work a,
             noc_ambs_work b
       WHERE NVL(a.asl,'x') = NVL(b.asl,'x')
         AND NVL(a.cd_presidio,'x') = NVL(b.cd_presidio,'x')
         AND NVL(a.ggmm_contatto,'x') = NVL(b.ggmm_contatto,'x')
         AND NVL(a.nr_ricetta,'x') = NVL(b.nr_ricetta,'x')
         AND NVL(a.cd_cont_prescr,'x') = NVL(b.cd_cont_prescr,'x')
         AND NVL(a.nr_prog_int,'x') = NVL(b.nr_prog_int,'x')Can you help me?
Tks
leo

Answer 1

Since you have not mentioned, which columns are getting duplicated, whats table structure, which column is pk, I think you can take help from below sample
SQL> ed
Wrote file afiedt.buf
  1  with c as
  2  (
  3  select 1 id, 'A' n from dual union all
  4  select 1,'A' from dual union all
  5  select 1,'A' from dual union all
  6  select 2,'e' from dual union all
  7  select 3,'r' from dual)
  8  select *
  9  from c
10  where id =(select t1.id
11         from c t1
12         group by id
13*        having count(*) >1)
SQL> /
        ID N
         1 A
         1 A
         1 A
SQL>