Query to find all the nodes that are two steps away from a particular node.

Posted by iecut on Stack Overflow See other posts from Stack Overflow or by iecut
Published on 2010-03-17T01:24:09Z Indexed on 2010/03/17 1:31 UTC
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sql-server

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graph

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query

Suppose I have two columns in a table that represents a graph, the first column is a FROMNODE and second one is TONODE. What I would like to know is that how will we find all the nodes that are two steps away from a particular node. Lets suppose I have a node numbered '1' and i would like to know all the nodes that are two steps away from it.

I have tried(I am assuming the table name as graph) SELECT FROMNODE FROM GRAPH WHERE TONODE=1 (this is to select all the nodes that are connected to node 1, but I couldn't figure out how would I find all the nodes that are two steps away from node 1??)

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