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我正在嘗試開發一個「文章」系統的過程中，數據庫中可能有一條文章條目，那麼儘可能多的文章數據鏈接到該ArticleData。我該如何重新組織SQL Server中的頁面順序（T-SQL）
現在我正在嘗試正確更新PageOrder。例如，我希望數字始終保持一致，如1到15。我不希望頁碼像這樣去。 1，1，3，6，8，9，10 ...它應該只是1,2,3,4,5,6,7。
我已經設法完成添加新記錄文章，因爲我插入一條新記錄，然後重新計算順序。問題是我想改變官方記錄。例如：
可以說我有5頁。
- 第1頁，
- 第2頁，
- 第3頁，
- 第4頁，
- 第5頁
可以說，我想第3頁成爲第5頁
- 第1頁，
- 第2頁，
- 第4頁，
- 第5頁，
- 第3頁
現在索引我希望能夠重新編制索引，以便它變成它應該是的樣子。
現在的問題是......如何在T-SQL過程（SQL Server 2005）中執行此操作？
ALTER PROCEDURE [dbo].[Admin_InsertOrUpdateArticle]
@Id int = null
,@ArticleId int = null
,@Header varchar(50)
,@ParentId int = null
,@ArticleType int
,@DisplayOrder int = 0
,@Content text
,@ModifiedById int
,@ModifiedBy varchar(50)
,@ModifiedDate datetime
,@Subject varchar(100)
,@NewPage int
AS
BEGIN
SET NOCOUNT ON;
UPDATE
[Article]
SET
[Header] = @Header
,[ParentId] = @ParentId
,[DisplayOrder] = @DisplayOrder
,[Type] = @ArticleType
WHERE
[Article].[Id] = @ArticleId
-- If Article does not exists then we don't have any record of even Article Data!
-- NEW RECORD!
IF(@@ROWCOUNT = 0)
BEGIN
INSERT INTO [Article]
(
[Header]
,[ParentId]
,[DisplayOrder]
,[Type]
)
VALUES
(
@Header
,@ParentId
,@DisplayOrder
,@ArticleType
);
INSERT INTO [ArticleData]
(
[ArticleId]
,[Content]
,[CreatedBy]
,[CreatedById]
,[ModifiedBy]
,[ModifiedById]
,[PostDate]
,[ModifiedDate]
,[Subject]
,[PageOrder]
)
VALUES
(
@@IDENTITY
,@Content
,@ModifiedBy
,@ModifiedById
,@ModifiedBy
,@ModifiedById
,@ModifiedDate
,@ModifiedDate
,@Subject
,1 -- First Page!!!
)
END
ELSE
BEGIN
-- We do have a Article Record, therefore we update the current page and check to see if it is a new page!
UPDATE
[ArticleData]
SET
[Content] = @Content
,[Subject] = @Subject
,[ModifiedBy] = @ModifiedBy
,[ModifiedById] = @ModifiedById
,[ModifiedDate] = @ModifiedDate
WHERE
[ArticleData].[Id] = @Id AND
[ArticleData].[ArticleId] = @ArticleId
-- Are we a new Article Data?
IF(@@ROWCOUNT = 0)
BEGIN
-- We are lets check to see if the page we want this article for exists
IF EXISTS (SELECT [PageOrder] FROM [ArticleData] WHERE [ArticleId] = @ArticleId AND [PageOrder] = @NewPage)
BEGIN
-- It does exists therefore we need to reorder the pages
UPDATE
[ArticleData]
SET
[PageOrder] = A.PageOrder + 1
FROM [ArticleData] A
WHERE
A.PageOrder >= @NewPage AND
[ArticleId] = @ArticleId
-- We now Insert The New data that we want at that page
INSERT INTO [ArticleData]
(
[ArticleId]
,[Content]
,[CreatedBy]
,[CreatedById]
,[ModifiedBy]
,[ModifiedById]
,[PostDate]
,[ModifiedDate]
,[Subject]
,[PageOrder]
)
VALUES
(
@ArticleId
,@Content
,@ModifiedBy
,@ModifiedById
,@ModifiedBy
,@ModifiedById
,@ModifiedDate
,@ModifiedDate
,@Subject
,@NewPage
)
END
ELSE
BEGIN
-- Since that page we want to add is not in reach we will simply add it to the very last page
INSERT INTO [ArticleData]
(
[ArticleId]
,[Content]
,[CreatedBy]
,[CreatedById]
,[ModifiedBy]
,[ModifiedById]
,[PostDate]
,[ModifiedDate]
,[Subject]
,[PageOrder]
)
VALUES
(
@ArticleId
,@Content
,@ModifiedBy
,@ModifiedById
,@ModifiedBy
,@ModifiedById
,@ModifiedDate
,@ModifiedDate
,@Subject
,(SELECT COUNT(Id)+1 FROM [ArticleData] WHERE [ArticleId] = @ArticleId) -- Add new Page as Last Record
)
END
END
ELSE
BEGIN
-- The article did update therefore lets reorder our pages based on the new page defined
-- Does this page in the article exists? IF it does lets update the pages
IF EXISTS (SELECT [PageOrder] FROM [ArticleData] WHERE [ArticleId] = @ArticleId AND [PageOrder] = @NewPage)
BEGIN
-- Update all pages with new numbers
UPDATE
[ArticleData]
SET
[PageOrder] = A.PageOrder + 1
FROM [ArticleData] A
WHERE
A.PageOrder >= @NewPage AND
[ArticleId] = @ArticleId
-- Update THIS article data with the new page number
UPDATE
[ArticleData]
SET
[PageOrder] = @NewPage
WHERE
[ArticleData].[Id] = @Id AND
[ArticleData].[ArticleId] = @ArticleId
END
ELSE
BEGIN
-- Page doesn't exists because what we want to change it to is to far out of range for example if there are only 5 pages, then the ordering will simply set this page to the last index
UPDATE
[ArticleData]
SET
[PageOrder] = (SELECT COUNT(Id) FROM [ArticleData] WHERE [Id] = @Id AND [ArticleId] = @ArticleId)
WHERE
[ArticleData].[Id] = @Id AND
[ArticleData].[ArticleId] = @ArticleId
END
END
END
END
我不認爲試圖保持這些順序號順序真的很有意義 - 你只會導致大量不必要的更新....額外提示： t使用1,2,3,4作爲頁面順序 - 而不是使用10,20,30,40 - 那麼你會留下一些空間來「擠進」兩個現有頁面中間的新頁面，而不必重新編寫大量頁面！如果你真的需要一個順序號碼爲您的網頁按正確的順序，你總是可以看看'ROW_NUMBER（）OVER（ORDER BY ....）'構造這是自動爲你做... – 2011-03-10 08:51:37
哦，頁碼是通過發送新頁面的頁碼來自動完成。如果文章和ArticleData已經存在，那麼它將僅用該新的訂單號來更新該訂單。最壞的情況下，我將不得不在代碼中執行此操作... – Benjamin 2011-03-10 08:56:41
你所要做的事沒有任何意義，因爲它可以說是所有'不按順序'，所以你需要做的是寫一個查詢，它會爲你做一個命令。否則，請將頁碼設置爲主鍵，因爲表的物理佈局由主鍵確定。 – Ryk 2011-03-10 09:54:45