問題描述
假設我有一個德國數字格式1,00"的數字,在 en-US 語言環境中等于 1.0.
Let's say I have a number in the german number format "1,00" which is equal to 1.0 in the en-US locale.
是否有內置的方法可以將 T-SQL 中的此文本轉換為相應的數字?似乎 CONVERT 和 CAST 只接受帶有 '.' 的數字.作為小數點分隔符,我認為沒有辦法告訴他們.
Is there a built-in way to convert this text in T-SQL to the corresponding number? It seems like CONVERT and CAST accept only numbers with '.' as the decimal separator and I see no way to tell them otherwise.
我正在考慮簡單地用 '.' 替換 ','但是如果我有一個像1.000,00"這樣的帶有千位分隔符的德語數字,這會變得很難看.
I was thinking about simply replacing ',' with '.' but this gets ugly if I have a german number with thounsands separator like "1.000,00".
在檢索到錯誤"的 SQL 結果后進行轉換不是一種選擇.
Doing the conversion after retrieving the "wrong" SQL result is not an option.
推薦答案
如果您想在 SQL Server 中執行此操作,則必須創建一個將字符串作為參數的 CLR 存儲過程/用戶定義函數并返回您想要的數字類型.您可能還需要使用一個參數來指示您可能希望使用哪些區域名稱(例如 en-US)來指示用于確定解析模式的區域性.
If you want to do this inside SQL Server, then you will have to create a CLR stored procedure/user-defined function which will take the string as a parameter and return the numeric type that you desire. You might also want to take a parameter that indicates what region names (en-US for example) you might want to use to indicate the culture to use for determining the parsing pattern.
然后,在代碼中,您將在 Double/Decimal/Int32 上調用 TryParse 方法并使用適當的 CultureInfo 來指示解析模式.您可以循環瀏覽其中的一堆,或使用其他一些信息來確定正確的模式.
Then, in the code, you would call the TryParse method on Double/Decimal/Int32 and use the appropriate CultureInfo to indicate the parse pattern. You can cycle through a bunch of them, or use some other information to determine the right pattern.
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