Write a stored procedure which takes input string and split them by characters - sql

Question

I am trying to create a stored procedure in SQL Server which will be used from C# Entity Framework.
My main focus is take a input of long string text then split that data by characters and return list of values of matching data.
In detail:
- is separator between name of data type and its value
: is separator between Type and ASIN
, is separator between two different value
I want to get List of data filtered by ASIN and Type from this stored procedure. I am getting full text string in the #DataString variable but I don't know how I can split my text and run SELECT to return all of data.
Any idea to do it? Ask any question you may have.
Example of long text string:
Type-1:ASIN-NsQf8,ASIN-YhQfu,ASIN-dpQf9,ASIN-rsWf3
The unfinished SQL code:
CREATE PROCEDURE dbo.lk_GetMatchingDataOfThirdparty
#DataString VARCHAR(MAX)
AS
BEGIN
SET NOCOUNT ON;
SELECT *
FROM ThirdPartyData
WHERE ASIN = '#value_get_from_string'
AND Type = '#value_get_from_string'
END

Answer 1

Use a split function:
CREATE FUNCTION [dbo].[split](
#delimited NVARCHAR(MAX),
#delimiter NVARCHAR(100)
) RETURNS #t TABLE (id INT IDENTITY(1,1), val NVARCHAR(MAX))
AS
BEGIN
DECLARE #xml XML
SET #xml = N'<t>' + REPLACE(#delimited,#delimiter,'</t><t>') + '</t>'
INSERT INTO #t(val)
SELECT r.value('.','nvarchar(MAX)') as item
FROM #xml.nodes('/t') as records(r)
RETURN
END
GO
DECLARE #DataString VARCHAR(MAX);
SET #DataString ='Type-1:ASIN-NsQf8,ASIN-YhQfu,ASIN-dpQf9,ASIN-rsWf3'
;WITH cte as (
SELECT a.id as [1], b.id as [2], c.id as [3], c.val
FROM (
SELECT * FROM dbo.split(#DataString, ':')
) a
CROSS APPLY dbo.split(a.val,',') b
CROSS APPLY dbo.split(b.val,'-') c
),
typecte as (
select b.val as [TypeValue]
from cte a
inner join cte b
ON a.[1] = b.[1]
AND a.[2] = b.[2]
AND a.[3]+1 = b.[3] -- Next value
WHERE a.val='Type'
),
asincte as (
select b.val as [ASINValue]
from cte a
inner join cte b
ON a.[1] = b.[1]
AND a.[2] = b.[2]
AND a.[3]+1 = b.[3] -- Next value
WHERE a.val='ASIN'
)
SELECT *
FROM ThirdPartyData
WHERE [ASIN] IN (SELECT [ASINValue] FROM asincte)
AND [Type] IN (SELECT [TypeValue] FROM typecte)

Answer 2

An oft overlooked way of doing coding that isn't really relational database related is a SQL CLR. String manipulation is a good example of something a SQL CLR could handle much better than a SQL script. What you could do in the above example is call a SQL CLR function that does the string manipulation on the long string text to return the values you need then plug those variables into your SELECT statement.