SQL Server中多列的透视

可以使用条件聚合:

SELECT [Order],
    MAX(CASE WHEN Area = 'Melt' THEN StartDate   END) AS Melt_SDate,
    MAX(CASE WHEN Area = 'Melt' THEN FinisthDate END) AS Melt_FDate,
    MAX(CASE WHEN Area = 'Melt' THEN Weight      END) AS Melt_Weight,

    MAX(CASE WHEN Area = 'HSM' THEN StartDate    END) AS HSM_SDate,
    MAX(CASE WHEN Area = 'HSM' THEN FinisthDa    END) AS HSM_FDate,
    MAX(CASE WHEN Area = 'HSM' THEN Weight       END) AS HSM_Weight,

    MAX(CASE WHEN Area = 'LSM' THEN StartDate    END) AS LSM_SDate,
    MAX(CASE WHEN Area = 'LSM' THEN FinisthDate  END) AS LSM_FDate,
    MAX(CASE WHEN Area = 'LSM' THEN Weight       END) AS LSM_Weight
FROM tab_name
GROUP BY [Order];   -- ORDER is reserved word, you should avoid such identifiers;

为了让它更简洁,你可以使用 IIF :

MAX(CASE WHEN Area = 'Melt' THEN StartDate   END) AS Melt_SDate,
<=>
MAX(IIF(Area='Melt',StartDate,NULL)) AS Melt_SDate,