I would stick with what elliot is trying to do but seeing as though you have already hard coded a where clause in your DB query to limit your results, you should do the same in your LDAP query too so that it looks something like this:
| ldapsearch domain=ED-people search="(&(objectClass=eduPerson)(weillCornellEduCWID=paa2013))" attrs="weillCornellEduCWID,weillCornellEduPrimaryTitle"
| table weillCornellEduCWID, weillCornellEduPrimaryTitle
| rename weillCornellEduCWID AS CWID
| append [
| dbquery "AcctAdmin" "select CWID, authorization_pk from people_db.database a
left join people_db.service s on s.service_pk = a.service_fk
left join people_db.person p on p.PERSON_PK = a.PERSON_FK
where CWID ='paa2013'" ]
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