在分组中获取重复记录

Question

我想根据月份过滤记录。要求是以月为单位的“已完成，待处理，已启动等”状态。这是我的查询，但我得到重复的记录。

SELECT distinct
        convert(varchar(7), w.ExpectedStartDate, 126) AS StatusOfMonth,
        COUNT(w.StatusTypeId) AS StatusCount,
        w.StatusTypeId,
        st.StatusTypeName

        FROM Table1 w
        LEFT OUTER JOIN StatusType st ON st.StatusTypeId = w.StatusTypeId
        WHERE   CONVERT(VARCHAR(20), w.ExpectedStartDate, 103) BETWEEN '10/01/2011' AND '14/04/2011'
GROUP BY ExpectedStartDate, w.StatusTypeId, st.StatusTypeName

请参阅图片以澄清我想要的内容。请让我知道如何才能得到正确的结果。

Answer 1

看起来像您按日期分组，而不是按月或按月状态分组 分组

DATEPART(M, ExpectedStartDate)

或

convert(varchar(7), w.ExpectedStartDate, 126)

而不仅仅是ExpectedStartDate

修改

回应评论： 试着摆脱

convert(varchar(7), w.ExpectedStartDate, 126) AS StatusOfMonth

并尝试这样：

SELECT
    convert(varchar, datepart(yyyy, w.ExpectedStartDate)) + '-' + CONVERT(varchar(3), DATENAME(month, w.ExpectedStartDate)),
    w.StatusTypeId,
    st.StatusTypeName,
    COUNT(w.StatusTypeId) AS StatusCount
FROM 
    Table1 w LEFT OUTER JOIN 
    StatusType st ON st.StatusTypeId = w.StatusTypeId
WHERE   
    w.ExpectedStartDate BETWEEN '1/10/2011' AND '04/14/2011'
GROUP BY 
    datepart(M, w.ExpectedStartDate),
    datepart(yyyy, w.ExpectedStartDate),
    w.StatusTypeId,
    st.StatusTypeName