TSQL String modify - string

Question

I have a problem with string.
I have a variable #Rights which looks like 'ASD,ZXC,QWE,IOP,JKL'
What I need to do is use this string in
SELECT * FROM dbo.Example
WHERE Rights IN (#Rights)
Problem is that I need to convert:
'ASD,ZXC,QWE,IOP,JKL'
to:
'ASD','ZXC','QWE','IOP','JKL'
How can I do this?

Answer 1

you can create a split function
CREATE FUNCTION [dbo].[Split]
(
#String NVARCHAR(4000),
#Delimiter NCHAR(1)
)
RETURNS TABLE
AS
RETURN
(
WITH Split(stpos,endpos)
AS(
SELECT 0 AS stpos, CHARINDEX(#Delimiter,#String) AS endpos
UNION ALL
SELECT endpos+1, CHARINDEX(#Delimiter,#String,endpos+1)
FROM Split
WHERE endpos > 0
)
SELECT 'Id' = ROW_NUMBER() OVER (ORDER BY (SELECT 1)),
'Data' = SUBSTRING(#String,stpos,COALESCE(NULLIF(endpos,0),LEN(#String)+1)-stpos)
FROM Split
)
GO
and after you can convert the string in a temp table
DECLARE #Rights NVARCHAR(128)
SET #Rights = 'ASD,ZXC,QWE,IOP,JKL'
SELECT *
INTO #Temp
FROM dbo.Split(#Rights , ',')
and after you can use it in your query like this
SELECT * FROM dbo.Example
WHERE Rights IN (SELECT Data FROM #Temp)

Answer 2

You can try like this:
DECLARE #xml xml, #str varchar(100), #delimiter varchar(10)
SET #str = 'ASD,ZXC,QWE,IOP,JKL'
SET #delimiter = ','
SET #xml = cast(('<X>'+replace(#str, #delimiter, '</X><X>')+'</X>') as xml)
SELECT C.value('.', 'varchar(10)') as value FROM #xml.nodes('X') as X(C)
SQL DEMO

Answer 3

You can use Dynamic SQL:
LiveDemo
-- sample data
CREATE TABLE #Example(ID INT IDENTITY(1,1), Rights VARCHAR(100));
INSERT INTO #Example VALUES ('ASD'), ('ABC'), ('IOP');
DECLARE #Rights NVARCHAR(MAX) = 'ASD,ZXC,QWE,IOP,JKL';
DECLARE #sql NVARCHAR(MAX) =
N'SELECT *
FROM #Example
WHERE Rights IN (''<placeholder>'')';
SET #sql = REPLACE(#sql, '<placeholder>', REPLACE(#Rights, ',', ''','''));
-- SELECT #sql; -- for debug
EXEC dbo.sp_executesql
#sql;
But you should reconsider using Table Valued Parameter instead.