?加个or不就是了?select * from v_talbe a where not exists
(select 1 from
(select v_key,max(rowid) rd from v_table group by v_key) b
where b.rd=a.rowid)
or v_key=null
(select 1 from
(select v_key,max(rowid) rd from v_table group by v_key) b
where b.rd=a.rowid)
or v_key=null
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