SQL för att hitta versaler från en kolumn

Detta kan vara ett sätt:

-- a test case
with test(id, str) as (
select 1, 'This is a EXAMPLE' from dual union all
select 2, 'This is a TEST' from dual union all
select 3, 'This is a VALUE' from dual union all
select 4, 'This IS aN EXAMPLE' from dual
)
-- concatenate the resulting words
select id, listagg(str, ' ') within group (order by pos)
from (
    -- tokenize the strings by using the space as a word separator
    SELECT id,
           trim(regexp_substr(str, '[^ ]+', 1, level)) str,
           level as pos           
      FROM test t
    CONNECT BY instr(str, ' ', 1, level - 1) > 0
      and prior id = id
      and prior sys_guid() is not null
    )
-- only get the uppercase words
where regexp_like(str, '^[A-Z]+$')   
group by id

Tanken är att symbolisera varje sträng, sedan klippa bort de ord som inte är gjorda av versaler och sedan sammanfoga de återstående orden.

Resultatet:

1    EXAMPLE
2    TEST
3    VALUE
4    IS EXAMPLE

Om du behöver hantera något annat tecken som versaler kan du redigera where villkor för att filtrera efter matchande ord; till exempel med '_':

with test(id, str) as (
select 1, 'This is a EXAMPLE' from dual union all
select 2, 'This is a TEST' from dual union all
select 3, 'This is a VALUE' from dual union all
select 4, 'This IS aN EXAMPLE' from dual union all
select 5, 'This IS AN_EXAMPLE' from dual
)
select id, listagg(str, ' ') within group (order by pos)
from (
    SELECT id,
           trim(regexp_substr(str, '[^ ]+', 1, level)) str,
           level as pos           
      FROM test t
    CONNECT BY instr(str, ' ', 1, level - 1) > 0
      and prior id = id
      and prior sys_guid() is not null
    )
where regexp_like(str, '^[A-Z_]+$')   
group by id

ger:

1   EXAMPLE
2   TEST
3   VALUE
4   IS EXAMPLE
5   IS AN_EXAMPLE