diff --git a/SQL/Q608.sql b/SQL/Q608.sql
new file mode 100644
index 0000000..a09c30d
--- /dev/null
+++ b/SQL/Q608.sql
@@ -0,0 +1,4 @@
+select id,case when p_id is null then 'Root' 
+when id not in (select distinct p_id from tree where p_id is not null) then 'Leaf'
+else 'Inner' end as type from tree
+order by 1
\ No newline at end of file