-- Returns one row per tournament with all natural keys needed for Oracle DIM lookups.
-- winner_org_id is NULL when the winner is an individual (Chess, StarCraft II, etc.)
SELECT
    t.game_id,
    CAST(DATE_FORMAT(t.start_date, '%Y%m%d') AS UNSIGNED)  AS start_date_key,
    CAST(DATE_FORMAT(t.end_date,   '%Y%m%d') AS UNSIGNED)  AS end_date_key,
    o.organization_id                                       AS winner_org_id,
    t.event_name,
    t.gender,
    t.prize_pool_usd,
    t.num_participants,
    COALESCE(s.duration_days,
             DATEDIFF(t.end_date, t.start_date) + 1)       AS duration_days,
    CASE WHEN t.club_championship_points = 1 THEN 1 ELSE 0
    END                                                     AS has_club_points
FROM tournament t
LEFT JOIN schedule     s ON t.tournament_id    = s.tournament_id
LEFT JOIN organization o ON o.name             = t.winner;