Sql server 获得结果的分钟数；2.仅采用临时表格法，耗时3分钟。通过使用sum（case-when）+临时表，它花费了1,45分钟。非常感谢，它很有效。我把你的和用过的方法结合起来，最后只花了3分钟就得到了结果。 SELECT SKU,SUM([SALES Qty])

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获得结果的分钟数；2.仅采用临时表格法，耗时3分钟。通过使用sum（case-when）+临时表，它花费了1,45分钟。非常感谢，它很有效。我把你的和用过的方法结合起来，最后只花了3分钟就得到了结果。

SELECT SKU,SUM([SALES Qty]) AS [Global Sales History Qty - All the years]
FROM dbo.[SALES]
WHERE [PO] IS NOT NULL
GROUP BY SKU

SELECT SKU,SUM([SALES Qty]) AS [Global Sales History Qty - All the years]
INTO #histORy
FROM dbo.[SALES]
WHERE [PO] IS NOT NULL
GROUP BY SKU

LEFT JOIN #histORy AS h ON MATINFO.[SKU]=h.[SKU]

    SELECT
            SKU
    FROM [MATINFO]
    -- Global Sales History Qty - All the years
    LEFT JOIN (SELECT
                    SKU
                  , SUM([SALES Qty]) AS [Global Sales History Qty - All the years]
            FROM dbo.[SALES]
            WHERE [PO] IS NOT NULL
            GROUP BY
                    SKU) histORy ON MATINFO.[SKU] = histORy.[SKU]
    -- Global Sales History Qty - Past 2 years
    LEFT JOIN (SELECT
                    SKU
                  , SUM([SALES Qty]) AS [Global Sales History Qty - Past 2 years]
            FROM dbo.[SALES]
            WHERE [PO] IS NOT NULL
            /* date range */
            AND [ORDER DATE] >= '20151101' AND [ORDER DATE] < '20161101'
            GROUP BY
                    SKU) histORy2 ON MATINFO.[SKU] = histORy2.[SKU]

SELECT
        SKU
      , SUM([SALES Qty])          AS [Qty_all_years]
      , SUM(CASE
                WHEN [ORDER DATE] >= '20151101' AND [ORDER DATE] < '20161101' 
                THEN [SALES Qty]
        END)                      AS [Qty_past_2_years]
FROM dbo.[SALES]
WHERE [PO] IS NOT NULL
GROUP BY
        SKU