> emkxp01=> delete from deltest s1 where s1.respdate not in ( select
> min(s2.respdate) from deltest s2 where s1.sessionid = s2.sessionid);
> ERROR: parser: parse error at or near "s1"
> emkxp01=>
Don't use s1. Just refer to native deltest in the subquery. That
should reference the outer table.
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