I need help with recursive operation

I do have 2 tables

#1 Inspections
ID
PARENT_ID
POSITION

#2 Resources
RESOURCES_ID
CULTURE_LANGUAGE
CAPTION

DATA SAMPLE (OUTPUT)

SELECT a.id, a.parent_id, a.position, b.culture_language, b.caption
FROM Inspections AS a
INNER JOIN InspectionsResources AS b ON
a.id = b.resource_id where culture_language=’en’

VEHICLES ID = 1, PARENT_ID = 0, POSITION=1
FORKLIFTS ID = 2, PARENT_ID = 0, POSITION=2
CARS ID = 3, PARENT_ID = 1, POSITION=1
MOTORCYCLES ID = 4, PARENT_ID = 1, POSITION=2
DOORS ID = 5, PARENT_ID = 3, POSITION=1
HANDLES ID = 6, PARENT_ID = 3, POSITION=2
…

I need to load all data for CARS only!!

Thank you Pinal

Alain

A recursive CTE can potentially go on forever. So, SQL Server limits it to 100 cycles. MAXRECURSION allows you to change that limit between 1 and 32767 or 0 which means unlimited.

I am student learning SQL server. I actaully didnot know what exactly maxrecursion function do?

can you please be precise.

Thanks&Regards,

Raghuveer.

Thank you for the content, i was looking for the same.

Please provide an example query.

Thanks for the post on CTE. Still I am not clear how can we restrict the recursion in CTE. Ex. The normal select statement (without MAXRECURSION) returns 10 records. If we give OPTION (MAXRECURSION 3), the query will throw error. If we give MAXRECURSION 4 or above it gives all the 10 records which is same as query without MAXRECURSION. Could you please clarify how can it restrict the recursion to say 3?

DECLARE @txt as nvarchar(100)
SET @txt = ‘Banana;Chocolote;Milk;Bread’

;WITH ParseText( Ltxt, Rtxt) AS (

SELECT –anchor member
Ltxt = LEFT (@txt, CHARINDEX( ‘;’, @txt) )
,Rtxt = RIGHT(@txt, LEN(@txt) – CHARINDEX( ‘;’,@txt) )

UNION ALL –Recursive member
SELECT

Ltxt = LEFT(tn.Rtxt, CHARINDEX( ‘;’,tn.Rtxt) )
,Rtxt = RIGHT(tn.Rtxt, LEN(tn.Rtxt) – CHARINDEX( ‘;’,tn.Rtxt) )
FROM ParseText tn where Ltxt ” — Recursive loop
)
SELECT
Ltxt = CASE WHEN Ltxt = ” THEN RTxt ELSE Ltxt END
FROM ParseText