使用MIN和COUNT一起

Question

我有這個表：

CALLS

| Number | User_id | Duration | Date | Call_type | 
    46534  2   65  1-1-13  5 
    46535  3   55  1-1-13  4 
    46537  1   47  1-2-13  5 
    46538  7   87  3-4-13  7 

，我需要知道的日期或日期在那裏我有電話的最低數量。

我該怎麼做？

Answer 1

SELECT Top 1 WITH TIES Number 
    COUNT(Number), 
    MIN(Date) 
FROM <tablename> 
GROUP BY Number 
ORDER BY COUNT(Number) 

Answer 2

組上的日期和排序的數量，也將增加與呼叫最少的日期在頂部：

select Date, count(*) as Calls 
from CALLS 
group by Date 
order by count(*)