mysql - 每个月的 Mysql 最小值和最大值以及相应的“日期”

Question

我有一个名为“rates”的表，它有两个字段“date”和“rate”。我喜欢获取每个月的 MIN 和 MAX 速率值及其发生日期。但我无法管理。

SELECT date,
MIN(rate) AS minRate,
MAX(rate) AS maxRate,
MONTH(date) AS monthName,
YEAR(date) AS yearName
FROM rates
GROUP BY yearName ASC, monthName ASC

澄清：我喜欢这样的东西：

 Months  MIN    mindate     MAX      maxdate  
 Jan     1.234  2012-01-13   1.534  2012-01-24  
 Feb     1.165  2012-02-28   1.373  2012-02-11  

等等

Answer 1

试试这个查询，数据库名称是 test，你可以使用你的或者删除它：

SELECT 
  MIN(rate) AS minRate,
  (select date from test.rates where rate = min(co.rate) and  
    month(date) = month(co.date) and year(date) = year(co.date) limit  
  )as min_date,
  MAX(rate) AS maxRate,
  (select date from test.rates where rate = max(co.rate) and  
    month(date) = month(co.date) and year(date) = year(co.date) limit 1) as 
  max_date
FROM test.rates co 
GROUP BY year(date) , month(date)