更新具有一个字段的当前最高（最大）值的行

Question

我有这个SQL查询，这是错误的。我想更新字段＆＃34; prevmonth＆＃34;在wins表中，但仅适用于具有该字段的最大值的记录＆＃34; month_wins＆＃34;。

UPDATE wins 
SET prevmonth_top=1 
WHERE month_wins = (SELECT MAX(month_wins) FROM wins)

但我怎么能这样做？

Answer 1

尝试这个技巧，

UPDATE wins
SET prevmonth_top=1 
ORDER BY month_wins DESC
LIMIT 1

或类似的东西，

UPDATE IGNORE giveaways 
SET winner = 1 
WHERE month_wins = (select maxID from (SELECT MAX(ID) maxID FROM giveaways) as t)

SAME AS You can't specify target table 'table_name' for update in FROM clause

Answer 2

运行以下查询，它可能会有所帮助：

UPDATE wins 
SET prevmonth_top=1  WHERE month_wins = 
(
      SELECT month_wins FROM (SELECT MAX(month_wins) FROM wins) AS month_wins
)