Question

I have a table named as employee

employee table fields and sample values

--------------------------------
id      name     parentid
--------------------------------
1       suresh    null
--------------------------------
2       ram       1
--------------------------------
3       ravi      2
--------------------------------
4       raju      3
--------------------------------

Here I need to take the name field value of current, parent and grand parent values for given id value. I need the output as below

Assume the input id is 4 then my expected output is

name    parentName    grandParentName
-----------------------------------------
raju    ravi           ram
-----------------------------------------

How can I write query for this?

Answer 1

Good question! This is tested and works.

select my.`name`, p.`name` as 'parent name', gp.`name` as 'grandparent name'
from employee my 
left outer join employee p on p.id=my.parentid 
left outer join employee gp on gp.id = p.parentid
where my.`id`=4