用标准sql的with实现递归查询（sql2005以上肯定支持，sql2000不清楚是否支持）：

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;