Question

I have a table in MySQL with below Structure

user_mst
----------------
user_id
user_name
left_id        (fk to user_mst->user_id)
right_id       (fk to user_mst->user_id)

Now I want to select the records the way that suppose,

user_id = 1 
left_id = 2
right_id = 3

Now if I query records using User ID = 1, it should print user names that has ID 2 and 3.

Sorry for the question updating, I would like to print the 2 separate records for left_id and right_id.

So How can I do that ?

Answer 1

SELECT
u2.*
FROM users u1
JOIN users u2 ON u2.user_id IN (u1.left_id, u1.right_id)
WHERE u1.user_id  = 1