用標准sql的with實現
遞歸查詢
with subqry(id,name,pid) as (
select id,name,pid
from test1
where id = 5 --指定id
union all
select test1.id,test1.name,test1.pid
from test1,subqry
where test1.pid = subqry.id
)
select*
from subqry;
