SQL- How to select all dynamic parent and child data in 1 query - sql

Question

I want to select all data that have parent and child. I have a sample table like this:
ID Name Parent
1 Mike 6000
2 Mike_x1 1
3 Mike_x2 2
4 Mike_x3 6333
5 Mike_x4 2
6 Mike_x5 3
7 Bob_x2 5
first of all i select data to get a header:
select * from table1 where parent = 1
and i get header data like this:
ID Name Parent
2 Mike_x1 1
from the header i got a new ID = 2 as a header data. So i select again to get a child:
select * from table1 where parent = 2
and i get data like this:
ID Name Parent
3 Mike_x2 2
5 Mike_x4 2
from the first child i got a new ID = 3 and ID = 5. So i select again to get another child:
select * from table1 where parrent = 3
and
select * from table1 where parrent = 5
and i got data like this:
ID Name Parrent
6 Mike_x5 3
and
ID Name Parrent
7 Bob_x2 5
Thats my steps to get parent and child. But i want to select using 1 query to get all parent and child data. When i do first select to get header select * from table1 where parrent = 1 , i will get a result like this:
ID Name Parrent
2 Mike_x1 1
3 Mike_x2 2
5 Mike_x4 2
6 Mike_x5 3
7 Bob_x2 5
Anybody help me? Is it possible for me to do it by 1 query, which is don't need to select manual like select * from where parent = 1,2,3,5 etc

Answer 1

SELECT DISTINCT * FROM table1
WHERE ID IN (SELECT Parent FROM table1)
AND Parent IN (SELECT ID FROM table1)
ORDER BY ID ASC

Answer 2

Assuming my understanding of the question is correct, this will " select all data that have parent and child"
Select T1.*
FROM TableName T1
INNER JOIN tableName Parents
on T1.ParentID = Parents.ID
INNER JOIN tableName Kids
on Kids.ParentID = T1.ID
corrected inner join on last element Kids.ID should have been Kids.ParentID
Should result in
ID Name Parent
2 Mike_x1 1
3 Mike_x2 2
5 Mike_x4 2
This works because of the inner self joins which exclude records that don't have parents or kids.
If these aren't the desired results: what are the expected results?
If you need to know who the parents are and who the kids are simply add to the select
Select t1.*, Parents.*, Kids.*
However if you need to traverse the hieracy and list the parents kids of kids etc... then XML path or a cte is needed.