Point for the tank REGEXP_LIKE space

With REGEXP_LIKE I am looking for the site that displays only the records:
1 uppercase character or Th + dot
or
1 uppercase character or Th + point + space + 1 uppercase character or Th + dot
with t as (
select 9 rn, 'P. P. P.' initials from dual union
select 8 rn, 'A.' initials from dual union
select 7 rn, 'C,' initials from dual union
select 6 rn, 'd.' initials from dual union
select 5 rn, 'FF.C.' initials from dual union
select 4 rn, 'Th. C.' initials from dual union
select 3 rn, 'B. test' initials from dual union
select 2 rn, 'B.A.' initials from dual union
select 1 rn, 'E. F.' initials from dual
)
select *
from t
where regexp_like(initials, '^[([:upper:]{1}|Th)\.[:space:]]{2,}?')
The query returns rn 1, 2, 3, 4, 5, 8, 9
but must return only the 1, 4, 8, 9

Thanks in advance
L.

RegExp should look like this:

where regexp_like (initial, ' ^ (([[: upper:]] |))) E) {1} \.) ([[: space:]] ([[: upper:]] |)) E) {1} \.) *$')

HTH

Tags: Database

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