Get string between 2 characters that repeats several times in sql server

Question

I need to extract multiple strings between 2 specific characters that repeats several times in a row. for example; these are 2 rows from my table:

id myString
         


        

Answer 1

One method uses recursive CTEs:

with cte as (
      select id,
             left(stuff(myString, 1, charindex('(', myString), ''),
                  charindex(')', myString) - charindex('(', myString) - 1
                 ) as val,
             stuff(myString, 1, charindex(')', myString) + 1) as rest
      from t
      where myString like '%(%)%'
      union all
      select id,
             left(stuff(rest, 1, charindex('(', rest), ''),
                  charindex(')', rest) - charindex('(', rest) - 1
                 ) as val,
             stuff(rest, 1, charindex(')', myString) + 1) as rest
      from cte
      where rest like '%(%)%'
     )
select id, val
from cte;