String separation from value

Question

please can you help. I have this:

And I want to have this:

And this:

In separate queries.

Answer 1

You can do something like

select  *
from yourtable
where columnone in
 (select regexp_substr('UserOne,UserTwo,UserThree','[^,]+', 1, level)
  from dual
  connect BY regexp_substr('UserOne,UserTwo,UserThree', '[^,]+', 1, level)
  is not null);

It very much seems that you can just run the subquery

select regexp_substr('UserOne,UserTwo,UserThree','[^,]+', 1, level)
from dual
connect BY regexp_substr('UserOne,UserTwo,UserThree', '[^,]+', 1, level)
is not null
offset 1 rows fetch next 1 rows only

change the values given to offset and fetch in your different queries.

see https://www.oratable.com/regex-split-comma-separated-string/