SQL Server 2008：在唯一索引中忽略排序規則？

Question

我已經創建了我的桌子複合唯一索引：

CREATE TABLE [dbo].[SearchIndexWord](
    [ID] [int] IDENTITY(1,1) NOT NULL, 
    [CatalogID] [int] NOT NULL, 
    [Word] [nvarchar](100) NOT NULL, 
CONSTRAINT [PK_SearchIndexWord] PRIMARY KEY CLUSTERED 
(
    [ID] ASC 
) 
WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] 
) 
ON [PRIMARY] 

CREATE UNIQUE NONCLUSTERED INDEX [IX_SearchIndexWord] ON [dbo].[SearchIndexWord] 
(
    [Word] ASC, 
    [CatalogID] ASC 
) 
WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) 
ON [PRIMARY] 

整個數據庫排序規則設置爲SQL_Latin1_General_CP1_CI_AS。當我運行下面的T-SQL，它打印「不等於」：

IF 'm3/h' = 'm³/h' 
    PRINT 'Equals' 
ELSE 
    PRINT 'Does not equal' 

然後，如果我嘗試以下插入語句：

INSERT INTO [SearchIndexWord] (Word, CatalogID) VALUES ('m3/h', 1), ('m³/h', 1) 

我收到以下錯誤信息：

Msg 2601, Level 14, State 1, Line 1 
Cannot insert duplicate key row in object 'dbo.SearchIndexWord' with unique index 'IX_SearchIndexWord'. 

這是爲什麼？我無法在文檔中找到它，但我認爲使用配置的排序規則檢查了兩個鍵被複制的情況。

我已經檢查了表格，列和索引排序方式，它們都等於數據庫排序規則。

Answer 1

試試這個：

IF CAST('m3/h' AS NVARCHAR(100)) = CAST('m³/h' AS NVARCHAR(100)) 
    PRINT 'Equals' 
ELSE 
    PRINT 'Does not equal' 

對於我來說，這將返回'Equals'這就解釋了爲什麼你得到重複鍵行錯誤。

我懷疑代碼IF 'm3/h' = 'm³/h'中的值是作爲VARCHAR創建的。