您需要MysqL不支持的递归联接。您唯一可以做的就是确定最大深度（由于p-> c，所以我将其设置为1），并以此确定所需的联接数：
：
SELECT
p.id as parent_id,
p.name as parent_id,
c1.id as child_id,
c1.name as child_name
FROM
my_table p
LEFT JOIN my_table c1
ON c1.parent = p.id
WHERE
p.parent=0
例如，如果最大深度为3，则需要3个自联接：
SELECT
p.id as parent_id,
p.name as parent_id,
c1.id as child_id_1,
c1.name as child_name_1,
c2.id as child_id_2,
c2.name as child_name_2,
c3.id as child_id_3,
c3.name as child_name_3
FROM
my_table p
LEFT JOIN my_table c1
ON c1.parent = p.id
LEFT JOIN my_table c2
ON c2.parent = c1.id
LEFT JOIN my_table c3
ON c3.parent = c2.id
WHERE
p.parent=0
602392714
清零编程群