Converting SQL to PS Query

Question

I have this piece of code in an Oracle SQL and I want to convert to PS Query.  Not sure how to do this.  Any help would be greatly appreciated.
from ps_audit_ax_names a
left join
    (select b.emplid, b.effdt, b.name from ps_names b
        where b.effdt = (select max(aa1.effdt)
            from ps_names aa1
            where aa1.emplid = b.emplid
        and name_type = 'PRI' 
        and aa1.effdt < (select max(aa2.effdt)
            from ps_names aa2
            where aa2.emplid = b.emplid
        and name_type = 'PRI'  ))
        and b.name_type = 'PRI')  BB
      on bb.emplid = a.emplid,

Answer 1

As far as I know, there's no way to left join to a subquery within PS/Query.
There are a couple of approaches that I would try:
1) you could create a view that contains the sql for your subquery.  After adding the view to the appropriate Query Tree(s), you could left outer join it in PS/Query.
2) You could do this as a union; one part of the union would have "exists" criteria (or just do a straight join) for the PS_Names subquery; the second part of the union would have a "not exists" criteria for the Names subquery.  That would be a bit trickier but could approximate what you're trying to achieve.