Question

我在一个表中保存了多个值。每个值对应一年，例如：

YEAR      | NAME
2014/2015 | Udine
2014/2015 | Firence
2015/2016 | Milan
2015/2016 | Chievo

在我的查询中，我希望返回具有最大年份的所有行，特别是2015/2016。所以我写道：

SELECT MAX( years ) , name
FROM teams
WHERE country =  'Italy'
AND league LIKE  'Serie A%'

但是此查询返回最后一行而不是所有可用行。我在等这个结果=＆gt; Milan, Chievo 注意：表值只是一个例子

Answer 1

只有当该团队不存在以后的行时，才会NOT EXISTS返回一行：

SELECT years, name
FROM teams t1
WHERE t1.country =  'Italy'
  AND t1.league LIKE  'Serie A%'
  AND NOT EXISTS (select 1 from teams t2
                  WHERE t2.country =  'Italy'
                    AND t2.league LIKE  'Serie A%'
                    AND t2.name = t1.name
                    AND t2.years > t1.years)

Answer 2

试

SELECT t1.years, t1.name
FROM teams t1
join teams t2 on t2.years = t1.years
where t1.years = (select max(t3.years) from teams t3)
group by t1.name

如何选择表中多个值的最大年份？

2 个答案: