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ALTER SESSION SET NLS_DATE_FORMAT = 'YYYY-MM-DD HH24:MI:SS';
with rws (person, str) as ( select 'Bob', 'AB,CR,DE' from dual UNION ALL select 'Jane', 'AB' from dual ), bounds (person, str, spos, epos) AS ( SELECT person, str, 1, INSTR(str, ',', 1) FROM rws UNION ALL SELECT person, str, epos + 1, INSTR(str, ',', epos + 1) FROM bounds WHERE epos > 0 ) SELECT person, CASE epos WHEN 0 THEN SUBSTR(str, spos) ELSE SUBSTR(str, spos, epos - spos) END AS value FROM bounds ORDER BY person, value;
PERSON
VALUE
Bob
AB
Bob
CR
Bob
DE
Jane
AB