Función O procedimiento de SQL Server para cortar registros de la tabla por parámetros de otra tabla

The following does what you requre, with the aid of a Split función:

CREATE FUNCTION dbo.Split(@StringToSplit NVARCHAR(MAX), @Delimiter NCHAR(1))
RETURNS TABLE
AS
RETURN
(   
    SELECT  ID = ROW_NUMBER() OVER(ORDER BY n.Number),
            Position = Number,
            Value = SUBSTRING(@StringToSplit, Number, CHARINDEX(@Delimiter, @StringToSplit + @Delimiter, Number) - Number)
    FROM    (   SELECT  TOP (LEN(@StringToSplit) + 1) Number = ROW_NUMBER() OVER(ORDER BY a.object_id)
                FROM    sys.all_objects a
            ) n
    WHERE   SUBSTRING(@Delimiter + @StringToSplit + @Delimiter, n.Number, 1) = @Delimiter
);

Once you have this function your code becomes relatively concise:

DECLARE @T TABLE (URL VARCHAR(1000));
DECLARE @T2 TABLE (URL VARCHAR(1000), Cut_Before INT);
-- POPULATE TABLES HERE (NOT INCLUDED TO SAVE SPACE)

WITH CTE AS
(   SELECT  FullURL = t.URL,
            BaseURLLength = LEN(ISNULL(t2.URL, t.URL)),
            Remainder = ISNULL(REPLACE(t.URL, t2.URL, ''), ''),
            Cut_Before = ISNULL(t2.Cut_Before, 1)
    FROM    @T AS t
            LEFT JOIN @T2 AS t2
                ON t.URL LIKE t2.URL + '/%'
)
SELECT  t.FullURL,
        Cut = SUBSTRING(t.FullURL, 1, BaseURLLength + LEN(s.Value) + s.Position - 1)
FROM    CTE t
        OUTER APPLY dbo.Split(t.Remainder, '/') AS s
WHERE   s.ID = t.Cut_Before;

Ejemplo en SQL Fiddle

The premise is, the first part inside the CTE identifies the part URL for each full url by joining using LIKE. Utilizando http://10.6.2.26/ERP/HRServices/WorkflowService.asmx as an example this will show the following:

FullURL:        http://10.6.2.26/ERP/HRServices/WorkflowService.asmx            
BaseURLLength:  16
Remainder:      /ERP/HRServices/WorkflowService.asmx
Cut_Before:     3

Where remainder is what is left of the full url after you have removed the part URL. The split function will then split the remainder into a new row for each of it's component parts:

SELECT *
FROM dbo.Split('/ERP/HRServices/WorkflowService.asmx', '/');

Regresará:

ID  Position    Value
1   1   
2   2           ERP
3   6           HRServices
4   17          WorkflowService.asmx

This is then limited to only the row that matches the Cut_Before value. This row can then be used to establish the position to "Cut" the full URL (the starting position + the length of the value at that position).

i modified my code. this code block will resolve your problem.

CREATE Function FindAbsolutePath(
 @TargetStr varchar(8000), 
 @SearchedStr varchar(8000), 
 @Occurrence int
)
RETURNS varchar(8000)
AS
BEGIN
    DECLARE @Result varchar(8000);

    if CHARINDEX('http://',@SearchedStr)>0 --fix http://
    BEGIN
        set @Occurrence=@Occurrence+2;
    END


    ;WITH Occurrences AS (
            SELECT 
            Number,
            ROW_NUMBER() OVER(ORDER BY Number) AS Occurrence
            FROM master.dbo.spt_values
            WHERE 
            Number BETWEEN 1 
            AND LEN(@SearchedStr) 
            AND type='P'
            AND SUBSTRING(@SearchedStr,Number,LEN(@TargetStr))=@TargetStr
    )



    SELECT @Result= SUBSTRING(@SearchedStr,0,Number)
    FROM Occurrences
    WHERE Occurrence=@Occurrence 
    return @Result
END

--select dbo.FindAbsolutePath('/','http://10.6.2.26/ERP/HRServices/WorkflowService.asmx',3)