oracle CONNECT BY PRIOR 叶子节点查找根节点

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SELECT  TRANS_ID
 FROM TRANS_INST
 WHERE connect_by_isleaf=1
 START WITH TRANS_ID =480242 
 CONNECT BY PRIORUP_TRANS_ID = TRANS_ID;

 

说明:

表TRANS_INST(TRANS_ID,UP_TRANS_ID)

480242表示树的任何一个节点

TRANS_ID子节点

UP_TRANS_ID父节点

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