select d.*, (select count(1) from sys_dictionaries c where c.parent_id = d.dictionaries_id) has_children from sys_dictionaries d where d.parent_id = #{parentId} order by d.order_by asc select getFullDIcId(#{id}) with recursive cte as ( select * from sys_dictionaries where parent_id = #{parentId} union all select d.* from sys_dictionaries d inner join cte c on d.parent_id = c.dictionaries_id ) select * from cte order by order_by asc WITH RECURSIVE descendant_ids AS ( SELECT dictionaries_id FROM sys_dictionaries WHERE parent_id = #{parentId} UNION ALL SELECT child.dictionaries_id FROM sys_dictionaries child JOIN descendant_ids parent ON child.parent_id = parent.dictionaries_id ) DELETE FROM sys_dictionaries WHERE dictionaries_id IN (SELECT dictionaries_id FROM descendant_ids);