CREATE TABLE table_204_212 (id NUMBER, "wager" CLOB, "winner" CLOB, "loser" CLOB, "location" CLOB, "date" CLOB, "notes" CLOB)

who won at least two times ?
SELECT "winner" FROM table_204_212 GROUP BY "winner" HAVING COUNT(*) >= 2
SELECT "winner" FROM "table_204_212" GROUP BY "winner" HAVING COUNT(*) >= 2