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  • sql 获取字符串首字母,循环

    //字符串首字母
    CREATE FUNCTION GetInitialLetter(@ChineseString NVARCHAR(4000)) 
    RETURNS NVARCHAR(4000) 
    AS
    BEGIN
     
    DECLARE @SingleCharacter NCHAR(1),
    @ReturnString NVARCHAR(4000) 
    SET @ReturnString = '' 
    
    WHILE LEN(@ChineseString)>0 
    BEGIN
    
    --依次取单个字符
    SET @SingleCharacter = LEFT(@ChineseString,1) 
    
    ----汉字字符,返回字符对应首字母,非汉字字符,返回原字符
    IF(UNICODE(@SingleCharacter) BETWEEN 19968 AND 19968+20901)
    SET @ReturnString = @ReturnString + 
    (SELECT TOP 1 PY FROM
    (SELECT 'A' AS PY,N'' AS ChineseCharacters 
    UNION All SELECT 'B',N'簿' 
    UNION All SELECT 'C',N'' 
    UNION All SELECT 'D',N'' 
    UNION All SELECT 'E',N'' 
    UNION All SELECT 'F',N'' 
    UNION All SELECT 'G',N'' 
    UNION All SELECT 'H',N'' 
    UNION All SELECT 'J',N'' 
    UNION All SELECT 'K',N'' 
    UNION All SELECT 'L',N'' 
    UNION All SELECT 'M',N'' 
    UNION All SELECT 'N',N'' 
    UNION All SELECT 'O',N'' 
    UNION All SELECT 'P',N'' 
    UNION All SELECT 'Q',N'' 
    UNION All SELECT 'R',N'' 
    UNION All SELECT 'S',N'' 
    UNION All SELECT 'T',N'' 
    UNION All SELECT 'W',N'' 
    UNION All SELECT 'X',N'' 
    UNION All SELECT 'Y',N'' 
    UNION All SELECT 'Z',N'' 
    )SpellingTable 
    where ChineseCharacters > = @SingleCharacter COLLATE Chinese_PRC_CS_AS_KS_WS 
    ORDER by PY ASC)
    ELSE
    SET @ReturnString = @ReturnString + @SingleCharacter
    
     
    SET @ChineseString = RIGHT(@ChineseString,LEN(@ChineseString)-1) 
    
    END
     
    RETURN @ReturnString 
    
    END
    GO
    
    //调用方式
    SELECT dbo.GetInitialLetter('中锴华章')
    //循环
    declare @id varchar(50)
    declare @name varchar(50)
    declare my_cursor cursor
    for(select id,name from community)
    open my_cursor;
    fetch next from my_cursor into @id,@name;
    while @@FETCH_STATUS=0
        begin 
            print @name;
            update community set english_name=(dbo.GetInitialLetter(@name)) where id=@id;
            fetch next from my_cursor into @id,@name;
        end
    close my_cursor;
    deallocate my_cursor;
    go
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  • 原文地址:https://www.cnblogs.com/vaevvaev/p/7600825.html
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