CREATE TABLE table_203_810 (id NUMBER, "#" NUMBER, "title" CLOB, "songwriters" CLOB, "producer ( s ) " CLOB, "performer  ( s ) " CLOB)

which performer was listed at least 3 times in both the producer column and the performer column ?
SELECT "producer(s)" FROM table_203_810 GROUP BY "producer(s)" HAVING COUNT(*) >= 3
SELECT "producer(s)" FROM "table_203_810" GROUP BY "producer(s)" HAVING COUNT(*) >= 3