Page History: Updating with a Self-Join - SQL Server

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Page Revision: Thu, Aug 12, 2010, 12:20 PM

The following SQL will copy the SnippetId from the folder "table" onto the ParentId of the item table.

@update item set item.ParentId = folder.SnippetId from dbo.Snippet item inner join dbo.Snippet folder on item.SnippetGroupId = folder.SnippetIndex and item.FolderFlag = 0 and folder.FolderFlag = 1@