sql query progenitor child relationship


i have db list progenitor child charge as:



nodeid    nodename    parentid
------------------------------
1         node1       0
2         node2       0
3         node3       1
4         node4       1
5         node5       3
6         node6       5
7         node7       2


here parentid = 0 means bottom turn node. i wish an sql query relapse child during turn progenitor category.



e.g. nodeid = 1, should relapse 3, 4, 5, 6.



i am controlling ms sql server 2005



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