Split in SQL server query by > - sql

Question

I have Product table and has values for category path as "2210>2215>2219" and so on. Where 2210, 2215, 2219 are category Ids from Category table.
Few of the categories are inactive in database which is maintained at Category table.
To find products with inactive category in category path, I wish to write a query.
I wish to do something like this:
select p.* from product p, category c
where c.categoryId in (split(p.categoryPath,'>'));
which should basically, split category path by '>' and return me few strings to be passed in 'in'.
Is there any way where I can split this and get separate strings to be passed in in clause for above query?

Answer 1

Try this
create a function
CREATE FUNCTION [dbo].[fn_Split](#text varchar(8000), #delimiter varchar(20))
RETURNS #Strings TABLE
(
position int IDENTITY PRIMARY KEY,
value varchar(8000)
)
AS
BEGIN
DECLARE #index int
SET #index = -1
WHILE (LEN(#text) > 0)
BEGIN
SET #index = CHARINDEX(#delimiter , #text)
IF (#index = 0) AND (LEN(#text) > 0)
BEGIN
INSERT INTO #Strings VALUES (#text)
BREAK
END
IF (#index > 1)
BEGIN
INSERT INTO #Strings VALUES (LEFT(#text, #index - 1))
SET #text = RIGHT(#text, (LEN(#text) - #index))
END
ELSE
SET #text = RIGHT(#text, (LEN(#text) - #index))
END
RETURN
END
Sql query would be
select p.* from product p, category c
where c.categoryId in (select value from fn_split(p.categoryPath,'>'));