防止當與FN插入分裂

插入正確自動排序，然而如果予執行存儲過程參數的用戶名=動態和id = 19,1,10 然後當我檢查收藏表I排序ID，同時插入防止當與FN插入分裂

見：

INSERT INTO Favorites(username, id) 
SELECT @username, i.item 
FROM fnSplit(@id, ',') i 
INNER JOIN dbo.Link f on f.id = i.item 
WHERE id IS NOT NULL

約拆分功能

的更多信息： https://msdn.microsoft.com/en-us/library/mt684588.aspx 注：我使用的是不同的NA我要的功能，但它是一回事

來源

2017-03-08 DynamicallyLinear

你的fnSplit（）是否也返回一個序列號？如果是這樣，只需在您的WHERE後添加一個訂購單 –

我相信你inner join正在改變順序。由於您只使用它進行過濾，因此您可以將inner join更改爲where exists。這應該保留這個順序：

INSERT INTO Favorites(username, id) 
SELECT @username, i.item 
FROM fnSplit(@id, ',') i 
WHERE EXISTS 
(
    SELECT 1 
    FROM dbo.Link f 
    WHERE f.id = i.item AND f.id IS NOT NULL 
)

來源

2017-03-08 19:51:53 Aducci

感謝您的幫助，刪除聯接解決了這個問題！ – DynamicallyLinear

例

Declare @username varchar(50) = 'dynamic' 
Declare @favorite varchar(50) = '19,1,10' 

Insert Into Favorites (username,id) 
Select @username,f.ID 
From [dbo].[udf-Str-Parse](@favorite,',') i 
Join dbo.Link f on f.id = i.RetSeq 
Where f.ID is not null 
Order By RetSeq     -- << Notice we added an Order By

如果與可視化幫助：

Select * From [dbo].[udf-Str-Parse]('19,1,10',',')

RetSeq RetVal 
1  19 
2  1 
3  10

這將提供一個序列的TVF（RetSeq）

CREATE FUNCTION [dbo].[udf-Str-Parse] (@String varchar(max),@Delimiter varchar(10)) 
Returns Table 
As 
Return ( 
    Select RetSeq = Row_Number() over (Order By (Select null)) 
      ,RetVal = LTrim(RTrim(B.i.value('(./text())[1]', 'varchar(max)'))) 
    From (Select x = Cast('<x>' + replace((Select replace(@String,@Delimiter,'§§Split§§') as [*] For XML Path('')),'§§Split§§','</x><x>')+'</x>' as xml).query('.')) as A 
    Cross Apply x.nodes('x') AS B(i) 
); 
--Thanks Shnugo for making this XML safe 
--Select * from [dbo].[udf-Str-Parse]('Dog,Cat,House,Car',',') 
--Select * from [dbo].[udf-Str-Parse]('John Cappelletti was here',' ') 
--Select * from [dbo].[udf-Str-Parse]('this,is,<test>,for,< & >',',') 
--Performance On a 5,000 random sample -8K 77.8ms, -1M 79ms (+1.16), -- 91.66ms (+13.8)

來源

2017-03-08 18:43:49

防止當與FN插入分裂

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