分組獲取重複記錄

Question

我想根據月份篩選記錄。要求是在月份有多少項目處於「已完成，未決，已開始等」狀態。這是我的查詢，但我得到重複的記錄。

 
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 

請參閱圖像澄清我想要什麼。請讓我知道我如何得到正確的結果。

Answer 1

看起來你的分組的日期，而不是按月或按月份 集團通過

DATEPART(M, ExpectedStartDate) 

或

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

，而不是僅僅ExpectedStartDate

編輯狀態

對此評論： 嘗試擺脫

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

也試着這樣說：

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