MISQUERY ONLINE

QUERY7.sql

WITH RECURSIVE solve(strrow,str) AS (
    SELECT str,str
    FROM tbl
  UNION ALL
    SELECT strrow,REPLACE(REPLACE(REPLACE(str, '()', ''),'{}',''),'[]','') 
    FROM solve 
    WHERE str!=REPLACE(REPLACE(REPLACE(str, '()', ''),'{}',''),'[]','')
)
SELECT i, 
  CASE WHEN str IN 
    (
      SELECT strrow 
      FROM solve 
      WHERE str = ''
    ) THEN 'YES' 
    ELSE 'NO' 
  END AS judgement 
FROM tbl;