Question

在SQL Server中，有一个内置函数为您引用一个名为QUOTENAME的标识符。是否存在相反的功能并再次删除引号？

换句话说，在下面的代码示例中，我将如何替换SOMEFUNCTION以使其为可以初始化@name的任何值返回1？

declare @name nvarchar(50) = 'hello]'

select 
    case 
        when SOMEFUNCTION(QUOTENAME(@name)) = @name then 1
        else 0
    end

Answer 1

使用PARSENAME：

declare @name sysname = quotename('foo]');
print @name;
set @name = parsename(@name, 1);
print @name;


[foo]]]
foo]

Answer 2

首先，创建一个SQL函数：

CREATE FUNCTION dbo.[Revert_QUOTENAME](@quotedvalue As VARCHAR(8000)) 
RETURNS VARCHAR(8000)
As 
BEGIN
    RETURN REPLACE(SUBSTRING(@quotedvalue, 2, LEN(@quotedvalue) - 2), ']]', ']')
END

然后，

declare @name nvarchar(50) = 'hello]'

select 
    case 
        when [Revert_QUOTENAME](QUOTENAME(@name)) = @name then 1
        else 0
    end

Answer 3

您可以在逻辑时使用大小写删除引号或括号。

ctrl.ctrlForm

结果：

this.ctrlForm

Answer 4

CODE;

ALTER FUNCTION [dbo].[funObtenerSinQuoteName]
(@vchrCadena VARCHAR(8000) , @vchrQuoteNameIni CHAR(1),@vchrQuoteNameFin CHAR(1))  

RETURNS VARCHAR(8000) AS  
BEGIN 
    DECLARE @vchrSubCadena VARCHAR (8000), @intCharIndexIni INT,@intCharIndexFin INT

    SET @intCharIndexIni=CHARINDEX(@vchrQuoteNameIni,@vchrCadena,0)
    SET @intCharIndexFin=CHARINDEX(@vchrQuoteNameFin,@vchrCadena,0)
    SET @vchrSubCadena=LTRIM(RTRIM(SubString(@vchrCadena,@intCharIndexIni+1,@intCharIndexFin-@intCharIndexIni-1)))

    RETURN @vchrSubCadena
END

QUOTENAME功能的反义词是什么？

4 个答案: