Verifica Se la stringa contiene caratteri accentati in SQL?

Question

Voglio eseguire un'attività se la stringa di input contiene caratteri accentati, altrimenti esegue un'altra attività in SQL. C'è un modo per verificare questa condizione in SQL?

Esempio:

@myString1 = 'àéêöhello!' 

IF(@myString1 contains any accented characters) 
    Task1 
ELSE 
    Task2 

Answer 1

SQL Fiddle: http://sqlfiddle.com/#!6/9eecb7d/1607

declare @a nvarchar(32) = 'àéêöhello!' 
declare @b nvarchar(32) = 'aeeohello!' 

select case 
    when (cast(@a as varchar(32)) collate SQL_Latin1_General_Cp1251_CS_AS) = @a 
    then 0 
    else 1 
end HasSpecialChars 

select case 
    when (cast(@b as varchar(32)) collate SQL_Latin1_General_Cp1251_CS_AS) = @b 
    then 0 
    else 1 
end HasSpecialChars 

(basato sulla soluzione qui: How can I remove accents on a string?)

Answer 2

Un modo grezzo è quello di verificare ASCII(<each character>) >= 128 per ogni personaggio. Qualcosa di simile

DECLARE @MyString NVARCHAR(100) 
SET @MyString = N'àéêöhello!' 

;WITH N as 
(
SELECT 1 r UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 
), Numbers 
as 
(
SELECT RN = ROW_NUMBER()OVER(ORDER BY N1.r) FROM N as N1 CROSS JOIN N as N2 
) 
SELECT MAX(CASE WHEN ASCII(SUBSTRING(@MyString,RN,1)) >= 128 THEN 1 ELSE 0 END) ContainsAccentedChars FROM Numbers 
WHERE RN <= LEN(@MyString) 

Answer 3

Io uso questa funzione per ottenere il testo (principalmente cognomi stranieri) ad una più paragonabile pianura latina (con alcune chicche indiv - sentitevi liberi di implementare il proprio ...).

Forse puoi usare anche questo. Basta confrontare, se la tua stringa è uguale a quella passata indietro.

CREATE FUNCTION [dbo].[GetRunningNumbers](@anzahl INT=1000000, @StartAt INT=0) 
RETURNS TABLE 
AS 
RETURN 
    SELECT TOP (ISNULL(@anzahl,1000000)) ROW_NUMBER() OVER(ORDER BY A) -1 + ISNULL(@StartAt,0) AS Nmbr 
    FROM (VALUES(1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) AS tblA(A) 
     ,(VALUES(1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) AS tblB(B) 
     ,(VALUES(1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) AS tblC(C) 
     ,(VALUES(1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) AS tblD(D) 
     ,(VALUES(1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) AS tblE(E) 
     ,(VALUES(1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) AS tblF(F); 

GO 
CREATE FUNCTION [dbo].[GetTextPlainLatin] 
(
    @Txt VARCHAR(MAX) 
    ,@CaseSensitive BIT 
    ,@KeepNumbers BIT 
    ,@NonCharReplace VARCHAR(100),@MinusReplace VARCHAR(100) 
    ,@PercentReplace VARCHAR(100),@UnderscoreReplace VARCHAR(100) --for SQL-Masks 
    ,@AsteriskReplace VARCHAR(100),@QuestionmarkReplace VARCHAR(100) --for SQL-Masks (Access-Style) 
) 
RETURNS VARCHAR(MAX) 
AS 
BEGIN 

DECLARE @txtTransformed VARCHAR(MAX)=(SELECT LTRIM(RTRIM(CASE WHEN ISNULL(@CaseSensitive,0)=0 THEN LOWER(@Txt) ELSE @Txt END))); 
RETURN 
(
    SELECT Repl.ASCII_Code 
    FROM dbo.GetRunningNumbers(LEN(@txtTransformed),1) AS pos 
    --ASCII-Codes of all characters in your text 
    CROSS APPLY(SELECT ASCII(SUBSTRING(@txtTransformed,pos.Nmbr,1)) AS ASCII_Code) AS OneChar 
    --re-code 
    CROSS APPLY 
    (
     SELECT CASE 
      WHEN OneChar.ASCII_Code BETWEEN ASCII('A') AND ASCII('Z') THEN CHAR(OneChar.ASCII_Code) 
      WHEN OneChar.ASCII_Code BETWEEN ASCII('a') AND ASCII('z') THEN CHAR(OneChar.ASCII_Code) 
      WHEN OneChar.ASCII_Code BETWEEN ASCII('0') AND ASCII('9') AND @KeepNumbers=1 THEN CHAR(OneChar.ASCII_Code) 
      WHEN OneChar.ASCII_Code = ASCII('ƒ') THEN 'f' 
      WHEN OneChar.ASCII_Code = ASCII('Š') THEN 'S' 
      WHEN OneChar.ASCII_Code = ASCII('š') THEN 's' 
      WHEN OneChar.ASCII_Code = ASCII('ß') THEN 'ss' 
      WHEN OneChar.ASCII_Code = ASCII('Ä') THEN 'Ae' 
      WHEN OneChar.ASCII_Code = ASCII('ä') THEN 'ae' 
      WHEN OneChar.ASCII_Code = ASCII('Æ') THEN 'Ae' 
      WHEN OneChar.ASCII_Code = ASCII('æ') THEN 'ae' 
      WHEN OneChar.ASCII_Code = ASCII('Ö') THEN 'Oe' 
      WHEN OneChar.ASCII_Code = ASCII('ö') THEN 'oe' 
      WHEN OneChar.ASCII_Code = ASCII('Œ') THEN 'Oe' 
      WHEN OneChar.ASCII_Code = ASCII('œ') THEN 'oe' 
      WHEN OneChar.ASCII_Code = ASCII('Ü') THEN 'Ue' 
      WHEN OneChar.ASCII_Code = ASCII('ü') THEN 'ue' 
      WHEN OneChar.ASCII_Code = ASCII('Ž') THEN 'Z' 
      WHEN OneChar.ASCII_Code = ASCII('ž') THEN 'z' 
      WHEN OneChar.ASCII_Code = ASCII('×') THEN 'x' 
      WHEN OneChar.ASCII_Code BETWEEN ASCII('À') AND ASCII('Å') THEN 'A' 
      WHEN OneChar.ASCII_Code BETWEEN ASCII('à') AND ASCII('å') THEN 'a' 
      WHEN OneChar.ASCII_Code = ASCII('Ç') THEN 'C' 
      WHEN OneChar.ASCII_Code = ASCII('ç') THEN 'c' 
      WHEN OneChar.ASCII_Code BETWEEN ASCII('È') AND ASCII('Ë') THEN 'E' 
      WHEN OneChar.ASCII_Code BETWEEN ASCII('è') AND ASCII('ë') THEN 'e' 
      WHEN OneChar.ASCII_Code BETWEEN ASCII('Ì') AND ASCII('Ï') THEN 'I' 
      WHEN OneChar.ASCII_Code BETWEEN ASCII('ì') AND ASCII('ï') THEN 'i' 
      WHEN OneChar.ASCII_Code = ASCII('Ð') THEN 'D' --island Eth 
      WHEN OneChar.ASCII_Code = ASCII('ð') THEN 'd' --island eth 
      WHEN OneChar.ASCII_Code = ASCII('Ñ') THEN 'N' 
      WHEN OneChar.ASCII_Code = ASCII('ñ') THEN 'n' 
      WHEN OneChar.ASCII_Code BETWEEN ASCII('Ò') AND ASCII('Ö') THEN 'O' 
      WHEN OneChar.ASCII_Code BETWEEN ASCII('ò') AND ASCII('ö') THEN 'o' 
      WHEN OneChar.ASCII_Code = ASCII('Ø') THEN 'O' 
      WHEN OneChar.ASCII_Code = ASCII('ø') THEN 'o' 
      WHEN OneChar.ASCII_Code BETWEEN ASCII('Ù') AND ASCII('Ü') THEN 'U' 
      WHEN OneChar.ASCII_Code BETWEEN ASCII('ù') AND ASCII('ü') THEN 'u' 
      WHEN OneChar.ASCII_Code = ASCII('Ý') THEN 'Y' 
      WHEN OneChar.ASCII_Code = ASCII('ý') THEN 'y' 
      WHEN OneChar.ASCII_Code = ASCII('Þ') THEN 'Th' --island Thorn 
      WHEN OneChar.ASCII_Code = ASCII('þ') THEN 'th' --island thorn 
      WHEN OneChar.ASCII_Code = ASCII('Ÿ') THEN 'Y' 
      WHEN OneChar.ASCII_Code = ASCII('ÿ') THEN 'y' 
      --Special with "minus" 
      WHEN OneChar.ASCII_Code = ASCII('-') THEN ISNULL(@MinusReplace,ISNULL(@NonCharReplace,CHAR(OneChar.ASCII_Code))) 
      --Special with mask characters 
      WHEN OneChar.ASCII_Code = ASCII('%') THEN ISNULL(@PercentReplace,ISNULL(@NonCharReplace,CHAR(OneChar.ASCII_Code))) 
      WHEN OneChar.ASCII_Code = ASCII('_') THEN ISNULL(@UnderscoreReplace,ISNULL(@NonCharReplace,CHAR(OneChar.ASCII_Code))) 
      WHEN OneChar.ASCII_Code = ASCII('*') THEN ISNULL(@AsteriskReplace,ISNULL(@NonCharReplace,CHAR(OneChar.ASCII_Code))) 
      WHEN OneChar.ASCII_Code = ASCII('?') THEN ISNULL(@QuestionmarkReplace,ISNULL(@NonCharReplace,CHAR(OneChar.ASCII_Code))) 
      --replace others   
      ELSE ISNULL(@NonCharReplace,CHAR(OneChar.ASCII_Code)) 
     END AS ASCII_Code 
    ) AS Repl  
    FOR XML PATH(''),TYPE 
).value('.','varchar(max)'); 
END 
GO 

SELECT dbo.GetTextPlainLatin('Case sensitive ÄÖ àéêöhello!',1,1,NULL,NULL,NULL,NULL,NULL,NULL); 
SELECT dbo.GetTextPlainLatin('Case in-sensitive ÄÖ àéêöhello!',0,1,NULL,NULL,NULL,NULL,NULL,NULL); 
GO 
DROP FUNCTION dbo.GetTextPlainLatin 
GO 
DROP FUNCTION dbo.GetRunningNumbers;