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select Parent/Child id recursive query

Posted By:      Posted Date: October 06, 2010    Points: 0   Category :Sql Server


Rank chid parid

7       6

5       4

4      3

3      2

2      Null


My output should be


Rank chiid parid

1        5       4

2        4      3

3        3      2

4        2      Null


parid : 6 not matching with child id, it should not come in select query

parid : 2 has child id , so it should be appear in the select query

Rank as row_number()

basically , last parent id should be next row of child id, O

only matching parid should be next row as child table..continues.....

I need some type of sub query , I dont want link please.



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