MySQL如果列= X则由DESC排序，否则为ASC

Question

如果finished = 1，如何通过start_date DESC命令查询，否则命令start_date ASC。现在它看起来像这样：

SELECT game_id, 
    event_id, 
    start_date, 
    best_of, 
    home_team_id, 
    away_team_id, 
    home_value, 
    away_value, 
    home_result, 
    away_result, 
    stream_url, 
    stats_url, 
    comments, 
    finished 
FROM betting_games 
ORDER BY finished ASC, 
    start_date ASC 
LIMIT 5

Answer 1

以这种方式：

SELECT *
FROM betting_games
ORDER BY finished ASC, 
         CASE 
            WHEN finished =  1 THEN - 1 * UNIX_TIMESTAMP(start_date)
            ELSE UNIX_TIMESTAMP(start_date)
         END ASC 

您无法从DESC表达式返回ASC或CASE。使用UNIX_TIMESTAMP，日期字段start_date将转换为整数，可用于按降序存储（一旦否定）。

Demo here