How can I create this simple view?

Question

Source:

LAN COD     DESC
C   1234    Description in spanish 
V   1234    Description in english 
C   1235    Description in spanish  
V   1235    Description in english   
C   1236    Description in spanish      
V   1236    Description in english

Created View:

COD, DESC in spanish, DESC in english

Answer 1

I think you want conditional aggregation:

select cod,
       max(case when language = 'C' then description end),
       max(case when language = 'V' then description end)
from t
group by cod;

Answer 2

Use a PIVOT :

SELECT *
FROM   table_name
PIVOT (
  MAX( descr )
  FOR lan IN (
    'C' AS Spanish,
    'V' AS English
  )
)

Which, for your sample data:

CREATE TABLE table_name ( LAN, COD, DESCR ) AS
SELECT 'C', 1234, 'Description in spanish' FROM DUAL UNION ALL
SELECT 'V', 1234, 'Description in english' FROM DUAL UNION ALL
SELECT 'C', 1235, 'Description in spanish' FROM DUAL UNION ALL
SELECT 'V', 1235, 'Description in english' FROM DUAL UNION ALL
SELECT 'C', 1236, 'Description in spanish' FROM DUAL UNION ALL
SELECT 'V', 1236, 'Description in english' FROM DUAL;

Outputs:

\n COD | SPANISH | ENGLISH               \n---: |  :--------------------- |  :--------------------- \n1234 |Description in spanish | Description in english\n1236 |Description in spanish | Description in english\n1235 |Description in spanish | Description in english\n

If you want it as a VIEW then:

CREATE VIEW view_name AS
SELECT *
FROM   table_name
PIVOT (
  MAX( descr )
  FOR lan IN (
    'C' AS Spanish,
    'V' AS English
  )
)

db<>fiddle here