CREATE TABLE table_204_386 (id DECIMAL, "res." TEXT, "record" TEXT, "opponent" TEXT, "method" TEXT, "event" TEXT, "date" TEXT, "round" DECIMAL, "time" TEXT, "location" TEXT, "notes" TEXT)

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SELECT MAX("date") - MIN("date") FROM table_204_386
SELECT MAX("date") - MIN("date") FROM "table_204_386"