[英]Aggregate function with image data type
无论如何,映像实际上只是一个varbinary,因此只需将其照原样投射,然后根据需要将其投射回去。 这是一个示例,向您展示它的工作原理。
DECLARE @Table AS TABLE (I IMAGE)
INSERT INTO @Table (I) VALUES (CAST('abcdefghi' AS IMAGE)),(CAST('abcdefghi' AS IMAGE)),(CAST('abcdefghi' AS IMAGE))
SELECT CAST(MAX(CAST(I AS VARBINARY(MAX))) AS IMAGE) as Img
FROM
@Table
SELECT
Mediums,
CAST([1] AS IMAGE) '1',
CAST([2] AS IMAGE) '2',
CAST([3] AS IMAGE) '3'
FROM
(
SELECT
m.Description 'Mediums',
u.ID,
CAST(d.ArtWorkPicture AS VARBINARY(MAX)) 'Picture'
FROM CDD_OrderDetail d
INNER JOIN CDD_Mediums m ON d.MediumID = m.ID
INNER JOIN CDD_UniqueUnits u ON d.UniqueUnitID = u.ID
) tblTemp
PIVOT
(
MAX(Picture)
FOR ID in ([1],[2], [3])
) tblPIVOT;
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