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create table snapshot_vazba(po_cluid, fo_cluid) as ( select '#P1', '#F1' from dual union all select '#P1', '#F2' from dual union all select '#P1', '#F3' from dual union all select '#P2', '#F2' from dual union all select '#P2', '#F4' from dual union all select '#P3', '#F4' from dual union all select '#P4', '#F5' from dual union all select '#P5', '#F6' from dual union all select '#P6', '#F6' from dual );
9 rows affected
select po_cluid, dense_rank() over (order by min(connect_by_root(rn))) kod from (select rownum rn, s.* from snapshot_vazba s) s connect by nocycle prior fo_cluid = fo_cluid or prior po_cluid = po_cluid group by po_cluid;
PO_CLUID
KOD
#P1
1
#P2
1
#P3
1
#P4
2
#P5
3
#P6
3