仅显示最近日期的记录

Question

我有一个查询返回有关库存的信息，但是查询正常工作，如下图所示，有一些重复。我希望它在图像中显示，但不是重复，我只希望它显示具有最新日期的行。

SELECT     TOP (100) PERCENT STOCK_CODE, TRANS_DATE, STOCK_QTY, DESCRIPTION, DETAIL
FROM         Tencia.dbo.STK_TRANS
WHERE     (TRANS_TYPE = N'STADJ') AND (STOCK_CODE LIKE 'LL%') AND (DESCRIPTION LIKE 'stock%') OR
                      (DESCRIPTION LIKE '%stk count%')
GROUP BY STOCK_CODE, TRANS_DATE, STOCK_QTY, DESCRIPTION, DETAIL
ORDER BY STOCK_CODE, TRANS_DATE DESC

Answer 1

您可以使用ROW_NUMBER()

执行此操作

;WITH CTE AS(
    SELECT
        *,
        rn = ROW_NUMBER() OVER(PARTITION BY STOCK_CODE ORDER BY TRANS_DATE DESC)
    FROM Tencia.dbo.STK_TRANS
    WHERE
        (TRANS_TYPE = N'STADJ') 
        AND (STOCK_CODE LIKE 'LL%')
        AND (DESCRIPTION LIKE 'stock%')
        OR (DESCRIPTION LIKE '%stk count%')
)
SELECT
    STOCK_CODE,
    TRANS_DATE,
    STOCK_QTY,
    DESCRIPTION,
    DETAIL
FROM CTE
WHERE rn = 1

---

您确定自己的WHERE条款吗？不应该是这样的：

WHERE
        TRANS_TYPE = N'STADJ'
        AND STOCK_CODE LIKE 'LL%'
        AND (
            DESCRIPTION LIKE 'stock%'
            OR DESCRIPTION LIKE '%stk count%'
        )