转换PascalCase串的"友好的名称为"在TSQL
-
10-07-2019 - |
题
我有一个表,列的值来自一枚举。我需要建立一个TSQL功能把这些价值观以"友好的名字"后检索。
实例:
'DateOfBirth' --> 'Date Of Birth'
'PrincipalStreetAddress' --> 'Principal Street Address'
我需要一个直TSQL UDF的解决方案。我没有选择安装扩大存储程序或CLR的代码。
解决方案
/*
Try this. It's a first hack - still has problem of adding extra space
at start if first char is in upper case.
*/
create function udf_FriendlyName(@PascalName varchar(max))
returns varchar(max)
as
begin
declare @char char(1)
set @char = 'A'
-- Loop through the letters A - Z, replace them with a space and the letter
while ascii(@char) <= ascii('Z')
begin
set @PascalName = replace(@PascalName, @char collate Latin1_General_CS_AS, ' ' + @char)
set @char = char(ascii(@char) + 1)
end
return LTRIM(@PascalName) --remove extra space at the beginning
end
其他提示
如果你使用SQL Server 2005中,你可以写一个本地CLR过程:
static string ToFriendlyCase(this string PascalString)
{
return Regex.Replace(PascalString, "(?!^)([A-Z])", " $1");
}
输出:
转换的疯Pascal大小写句子友好案例
如果你的不的使用2005年,那么你得手动解析它或使用扩展程序引用regex对象。一篇好文章可以在这里找到:
http://www.codeproject.com/KB/mcpp/xpregex.aspx
修改:一种UDF不能影响数据库,所以你不能注册正则表达式的COM对象,使蒙上这一想法出来。存储过程然而,可以 - 。因此,可能是一个路由
为了做一个区分大小写的比较,你将不得不设置排序的查询是区分大小写的,然后用一个取代我想......这里有可能是在指点你有帮助的文章断在正确的方向:
不是最好的解决方法,但它的工作原理:
declare @pascalCasedString nvarchar(max) = 'PascalCasedString'
declare @friendlyName nvarchar(max) = ''
declare @currentCode int;
declare @currentChar nvarchar;
while (LEN(@pascalCasedString) > 0)
begin
set @currentCode = UNICODE(@pascalCasedString)
set @currentChar = NCHAR(@currentCode)
if ((@currentCode >= 65) AND (@currentCode <= 90))
begin
set @friendlyName += SPACE(1)
end
set @friendlyName += @currentChar
set @pascalCasedString = RIGHT(@pascalCasedString,LEN(@pascalCasedString) - 1)
end
select @friendlyName
declare @arg varchar(20)
set @arg = 'DateOfBirthOnMonday'
declare @argLen int
set @argLen = len(@arg)
declare @output varchar(40)
set @output = ''
declare @i int
set @i = 1
declare @currentChar varchar(1)
declare @currentCharASCII int
while (1 = 1)
begin
set @currentChar = substring(@arg, @i, 1)
set @currentCharASCII = ascii(@currentChar)
if (@currentCharASCII >= 65 and @currentCharASCII <= 90)
set @output = @output + ' '
set @output = @output + @currentChar
set @i = @i+ 1
if (@i > @argLen) break
end
set @output = ltrim(rtrim(@output))
print @output
@arg的值更改为东西,你想测试。
此外,可能需要改变@output声明,以容纳具有相同的长度的它可能需要空格@arg +数字字符串。我已在例如一倍它。
我找到这工程完全一样,需要。礼貌的 SqlAuthority.com:
CREATE FUNCTION dbo.udf_TitleCase (@InputString VARCHAR(4000) )
RETURNS VARCHAR(4000)
AS
BEGIN
DECLARE @Index INT
DECLARE @Char CHAR(1)
DECLARE @OutputString VARCHAR(255)
SET @OutputString = LOWER(@InputString)
SET @Index = 2
SET @OutputString =
STUFF(@OutputString, 1, 1,UPPER(SUBSTRING(@InputString,1,1)))
WHILE @Index <= LEN(@InputString)
BEGIN
SET @Char = SUBSTRING(@InputString, @Index, 1)
IF @Char IN (' ', ';', ':', '!', '?', ',', '.', '_', '-', '/', '&','''','(')
IF @Index + 1 <= LEN(@InputString)
BEGIN
IF @Char != ''''
OR
UPPER(SUBSTRING(@InputString, @Index + 1, 1)) != 'S'
SET @OutputString =
STUFF(@OutputString, @Index + 1, 1,UPPER(SUBSTRING(@InputString, @Index + 1, 1)))
END
SET @Index = @Index + 1
END
RETURN ISNULL(@OutputString,'')
END
使用:
SELECT dbo.udf_TitleCase('This function will convert this string to title case!')
输出:
This Function Will Convert This String To Title Case!
不隶属于 StackOverflow