SQL을 사용하여 날짜 필드에서 월별로 그룹화하는 방법

SQL을 사용하여 날짜 필드에서 월별로 그룹화하는 방법

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날짜 필드에서 월별로만 그룹화하고 일별로 그룹화하지 않으려면 어떻게해야합니까?

내 날짜 필드는 다음과 같습니다.

2012-05-01

내 현재 SQL은 다음과 같습니다.

select  Closing_Date, Category,  COUNT(Status)TotalCount from  MyTable
where Closing_Date >= '2012-02-01' and Closing_Date <= '2012-12-31'
and Defect_Status1 is not null
group by  Closing_Date, Category

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나는 이것을 사용할 것이다 :

SELECT  Closing_Date = DATEADD(MONTH, DATEDIFF(MONTH, 0, Closing_Date), 0), 
        Category,  
        COUNT(Status) TotalCount 
FROM    MyTable
WHERE   Closing_Date >= '2012-02-01' 
AND     Closing_Date <= '2012-12-31'
AND     Defect_Status1 IS NOT NULL
GROUP BY DATEADD(MONTH, DATEDIFF(MONTH, 0, Closing_Date), 0), Category;

매월 1 일에 그룹화되므로

`DATEADD(MONTH, DATEDIFF(MONTH, 0, '20130128'), 0)` 

줄 것이다 '20130101'. 일반적으로 날짜를 날짜로 유지하므로이 방법을 선호합니다.

또는 다음과 같이 사용할 수 있습니다.

SELECT  Closing_Year = DATEPART(YEAR, Closing_Date),
        Closing_Month = DATEPART(MONTH, Closing_Date),
        Category,  
        COUNT(Status) TotalCount 
FROM    MyTable
WHERE   Closing_Date >= '2012-02-01' 
AND     Closing_Date <= '2012-12-31'
AND     Defect_Status1 IS NOT NULL
GROUP BY DATEPART(YEAR, Closing_Date), DATEPART(MONTH, Closing_Date), Category;

원하는 출력이 무엇인지에 따라 다릅니다. (귀하의 예에서 마감 연도는 필요하지 않지만 날짜 범위가 연도 경계를 넘으면 그럴 수 있습니다).

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DATEPART 함수를 사용하여 날짜에서 월을 추출합니다.

따라서 다음과 같이 할 수 있습니다.

SELECT DATEPART(month, Closing_Date) AS Closing_Month, COUNT(Status) AS TotalCount
FROM t
GROUP BY DATEPART(month, Closing_Date)

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이를 위해 FORMAT 함수를 사용했습니다.

select
 FORMAT(Closing_Date, 'yyyy_MM') AS Closing_Month
 , count(*) cc 
FROM
 MyTable
WHERE
 Defect_Status1 IS NOT NULL
 AND Closing_Date >= '2011-12-01'
 AND Closing_Date < '2016-07-01' 
GROUP BY FORMAT(Closing_Date, 'yyyy_MM')
ORDER BY Closing_Month

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추가함으로써 MONTH(date_column)에서 GROUP BY.

SELECT Closing_Date, Category,  COUNT(Status)TotalCount
FROM   MyTable
WHERE  Closing_Date >= '2012-02-01' AND Closing_Date <= '2012-12-31'
AND    Defect_Status1 IS NOT NULL
GROUP BY MONTH(Closing_Date), Category

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DATEPART function doesn't work on MySQL 5.6, instead use MONTH('2018-01-01')

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SELECT  to_char(Closing_Date,'MM'), 
        Category,  
        COUNT(Status) TotalCount 
FROM    MyTable
WHERE   Closing_Date >= '2012-02-01' 
AND     Closing_Date <= '2012-12-31'
AND     Defect_Status1 IS NOT NULL
GROUP BY Category;

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You can do this by using Year(), Month() Day() and datepart().

In you example this would be:

select  Closing_Date, Category,  COUNT(Status)TotalCount from  MyTable
where Closing_Date >= '2012-02-01' and Closing_Date <= '2012-12-31' 
and Defect_Status1 is not null 
group by Year(Closing_Date), Month(Closing_Date), Category

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Try the Following Code

SELECT  Closing_Date = DATEADD(MONTH, DATEDIFF(MONTH, 0, Closing_Date), 0), 
        Category,  
        COUNT(Status) TotalCount 
FROM    MyTable
WHERE   Closing_Date >= '2012-02-01' 
AND     Closing_Date <= '2012-12-31'
AND     Defect_Status1 IS NOT NULL
GROUP BY DATEADD(MONTH, DATEDIFF(MONTH, 0, Closing_Date), 0), Category;

참고URL : https://stackoverflow.com/questions/14565788/how-to-group-by-month-from-date-field-using-sql