Question

I’m having a problem with my select statement at the end. What I want to do is select two levels but im getting no results with this statement. note that if @Level is 1 I don’t want to go less than 1 or it might mess up the result so there might be a condition aswell

the part where it goes @Level = @Level -1 I’m having problems with

FROM c WHERE c.Level = @Level AND c.Level = @Level - 1 ORDER BY Level ASC

or this one

FROM c WHERE c.Level BETWEEN @Level AND c.Level - 1 ORDER BY Level ASC

SQL

DECLARE @Department TABLE
(
Id INT NOT NULL,
Name varchar(50) NOT NULL,
ParentId int NULL
)

INSERT INTO @Department SELECT 1, 'Toys', null
INSERT INTO @Department SELECT 2, 'Computers', null,  
INSERT INTO @Department SELECT 3, 'Consoles', 2
INSERT INTO @Department SELECT 4, 'PlayStation 3', 3
INSERT INTO @Department SELECT 5, 'Xbox 360', 2
INSERT INTO @Department SELECT 6, 'Games', 1
INSERT INTO @Department SELECT 7, 'Puzzles', 6
INSERT INTO @Department SELECT 8, 'Mens Wear', null
INSERT INTO @Department SELECT 9, 'Mens Clothing', 8
INSERT INTO @Department SELECT 10, 'Jackets', 9
INSERT INTO @Department SELECT 11, 'Shoes', 9
INSERT INTO @Department SELECT 12, 'Rain Coats', 10

DECLARE  @Level int = 4
;WITH c AS
(
SELECT Id, ParentId, Name, 1 AS Level
FROM @Department
WHERE ParentId IS NULL

UNION ALL

SELECT t.Id, t.ParentId, T.Name, c.Level + 1 AS Level
FROM @Department T
INNER JOIN c on t.ParentId = c.Id   
)
SELECT Id, ParentId, Name, Level

FROM c WHERE c.Level = @Level AND c.Level = @Level - 1 ORDER BY Level ASC

FROM c WHERE c.Level BETWEEN @Level AND @Level - 1 ORDER BY Level ASC

Answer 1

Maybe FROM c WHERE c.Level BETWEEN @Level -1 AND @Level ORDER BY Level ASC