sql - Removing Self Join -


i have below query 

select h.*   table1 h        left join table1 e               on e.fundno = h.fundno                   , e.trantype = 'd'                  , e.modifiedon > h.modifiedon  e.fundno null        , h.trantype != 'd'

is there way avoid self join. know can rewritten using not exists trying avoid hitting table twice..

if trantype same can use row_number this.. since trantype different couldn't find way it..

you seem want non-d rows there no "d" row modifed @ laster time. use window functions:

select h.* (select h.*,              max(case when h.transtype = 'd' modifiedon end) on (partition fundno) last_d_modifiedon       table1 h      ) h (last_d_modifiedon null or last_d_modifiedon < modifiedon) ,       h.transtype <> 'd';

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