Copying data from one table to another, but not duplicate

Question

Good afternoon!
I am new to Oracle SQL, I have a difficulty.
I have a script that copies or add another table with data from another table.
If the table already has 01 "Registry 01" when you make a copy of the data in table 02, can not duplicate the "Registry 01" again.
As the table already exists since the beginning of the year before last and duplicate information, I can not apply the UNIQUE constraint because of the error. I have to make this change from now.
How to perform this validation so that no duplicate data?
DECLARE
w_cont NUMBER;
CURSOR c_simpro IS
SELECT sc.cd_simpro,
sc.ds_produto,
sp.qt_embalagem,
MAX(sp.dt_vigencia)
FROM simpro_cadastro sc,
simpro_preco sp
WHERE sc.cd_simpro = sp.cd_simpro
GROUP BY sc.cd_simpro,
sc.ds_produto,
sp.qt_embalagem;
BEGIN
FOR r_simpro IN c_simpro LOOP
w_cont := 0;
SELECT COUNT(1)
INTO w_cont
FROM pls_material pm
WHERE pm.cd_material_ops = r_simpro.cd_simpro;
IF w_cont = 0 THEN
INSERT INTO pls_material(nr_sequencia,
dt_atualizacao,
nm_usuario,
dt_atualizacao_nrec,
nm_usuario_nrec,
ie_tipo_despesa,
cd_estabelecimento,
nr_seq_estrut_mat,
cd_simpro,
ds_material,
ie_situacao,
ds_material_sem_acento,
dt_inclusao,
cd_material_ops_orig,
cd_unidade_medida,
cd_material_ops,
qt_conversao_simpro)
VALUES(pls_material_seq.nextval,
SYSDATE,
'ES-SIMPRO',
SYSDATE,
'ES-SIMPRO',
3,
1,
3,
r_simpro.cd_simpro,
r_simpro.ds_PRODUTO,
'A',
r_simpro.ds_PRODUTO,
SYSDATE,
r_simpro.cd_simpro,
'un',
TRIM(to_char(r_simpro.cd_simpro,'0000099999')),
r_simpro.qt_embalagem);
COMMIT;
END IF;
IF w_cont > 0 THEN
UPDATE pls_material p
SET p.qt_conversao_simpro = r_simpro.qt_embalagem,
p.dt_atualizacao = SYSDATE
WHERE p.cd_simpro = r_simpro.cd_simpro;
COMMIT;
END IF;
END LOOP;
END;
Edited by: 983464 on 22/01/2013 10:30

Answer 1

Hi,
in addition to what Marwin has already said, I suggest you to post CREATE TABLE and INSERT statements (as mentioned in the FAQ).
The error you are getting from MERGE command is because you need a way to uniquely identify within the table. So it's is important to know also if your table has a primary key/unique index so the keys could to be used in the MERGE command.
Additionally when you put some code or output please enclose it between two lines starting with {noformat}{noformat}
i.e.:
{noformat}{noformat}
SELECT ...
{noformat}{noformat}
Regards.
Al