postgresql - excluding rows from resultset in postgres -

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this result set

resultset

i returning result set on base of refid using where refid in. on here, need apply logic without kind of programming (means sql query only).

if in result set, getting period particular refid other rows same refid must not returned.

for example, 2667105 having period myid = 612084598 must not returned in result set.

according me can achieved using case have no idea how use it, mean don't know should use case statement in select statement or where clause...

edit:

this how suppose work,

myid = 612084598 default row refid = 2667105 if wants refid period = 6 must return rows except myid = 612084598

but if looking period = 12, period no specific refid present in database.. must return rows except first one.. means rows refid default one..

not clear definition of problem, try this:

with cte (     select         *,         first_value(period) over(partition refid order myid) fv     test ) select     myid, refid, period cte period not null or fv null

sql fiddle demo


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