Question

我有这个SP

CREATE PROCEDURE ApplyExistingImageAcrossModel
@capidfrom int,
@capidto int,
@type int
AS
BEGIN

DECLARE @imageid uniqueidentifier

INSERT INTO ImageMetaData
(ImageId,CapId,[Type],Source,DateAdded,OriginalFileName,OriginalUrl,isDefault,Height,Width,ViewType,CapImageId,islive)
SELECT @imageid,@capidto,@type,source,GETDATE(),originalfilename,originalurl,isdefault,height,width,viewtype,capimageid,islive 
FROM ImageMetaData 
WHERE [type] = @type AND capid = @capidfrom

INSERT INTO ImageData
(ImageId,ImageBinary)
SELECT @imageid,ImageBinary 
FROM ImageData A
LEFT JOIN ImageMetaData B
ON A.ImageId = B.ImageId
WHERE B.[type] = @type 
AND B.capid = @capidfrom

END

问题是，select可以返回特定capid的多个记录，我想将它们全部复制，但每条记录都需要一个唯一的@imageid，我只生成一次，我需要在两个表中使用imageid。

由于

Answer 1

而是创建一个变量，声明表变量以存储唯一ID。然后，使用OUPUT子句记录所有ID。像这样：

DECLARE @DataSource TABLE 
(
    @imageid uniqueidentifier
);

INSERT INTO ImageMetaData(ImageId,CapId,[Type],Source,DateAdded,OriginalFileName,OriginalUrl,isDefault,Height,Width,ViewType,CapImageId,islive)
OUTPUT inserted.ImageId
INTO @DataSource (@imageid)
SELECT NEWID(),@capidto,@type,source,GETDATE(),originalfilename,originalurl,isdefault,height,width,viewtype,capimageid,islive 
FROM ImageMetaData 
WHERE [type] = @type AND capid = @capidfrom

现在，在@DataSource表格中，我们插入了imageID。随心所欲地与他们合作。

复制多个记录时，SQL会生成唯一ID

1 个答案: