Sql 在按月分组日期时，如何将月份从INT转换为VARCHAR

我需要以可读的方式总结历年来每个月的采访次数

SELECT month(i.Date) AS Month, Year(i.Date) AS Year, Count(i.Id) AS' Number of Interviews'
FROM Interviews i
GROUP BY month(i.Date), year(i.Date)
ORDER BY year(i.Date) DESC, month(Date) ASC

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我希望查询以VARCHAR形式返回Month，比如'一月'，而不是'Month'函数中的默认INT。

一个解决方案，适用于大多数DBMS，是一个

CASE

表达式

SELECT CASE month(i.date)
         WHEN 1 THEN
           'January'
         ...
         WHEN 12 THEN
           'December'
       END month,
       year(i.date) year,
       count(i.id) number_of_interviews
       FROM interviews i
       GROUP BY month(i.date),
                year(i.date)
       ORDER BY year(i.date) DESC,
                month(i.date) ASC;

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对于MySql，它将是：

SELECT 
  monthname(i.Date) AS Month, 
  Year(i.Date) AS Year, 
  Count(i.Id) AS `Number of Interviews`
FROM Interviews i
GROUP BY month(i.Date), monthname(i.Date), year(i.Date)
ORDER BY year(i.Date) DESC, month(i.Date) ASC

对于SQL Server：

SELECT 
  datename(month, i.date) AS Month, 
  Year(i.Date) AS Year, 
  Count(i.Id) AS [Number of Interviews]
FROM Interviews i
GROUP BY month(i.Date), datename(month, i.date), year(i.Date)
ORDER BY year(i.Date) DESC, month(i.Date) ASC

SELECT count(1), format(dateColumn, 'yyyy-MM')
FROM tableName
GROUP BY format(dateColumn, 'yyyy-MM')
ORDER BY 2