Question

I am having trouble with this query. I have read quite a few things but have yet to find a solution. The problem is with the subquery- it really doesn’t like it. Can someone help me get this to work?

The first table represents a Work Performed table and the second talbe shows Employee Information. I am basically trying to get a supervisor name for an employee using the ‘position_reports_to’ field which is an HR code. By the way, this is in Teradata.

Thanks!

select
t1.record_number,
T1.record_created_by,
T2.last_name,
T2.first_name,
T2.employee_no,
t2.position_number,
T2.position_reports_to as SUPID,
(select last_name from T2 where SID=T2.position_nbr) as SUP
from T1
left join T2 on T1.record_created_by=T2.employee_no
where
t1.record_create_date=current_date

Answer 1

You can try another LEFT JOIN instead of the subquery:

SELECT
   t1.record_number,
   T1.record_created_by,
   T2.last_name,
   T2.first_name,
   T2.employee_no,
   t2.position_number,
   T2.position_reports_to AS SUPID,
   sup.last_name AS sup_last_name
FROM T1
LEFT JOIN T2 ON T1.record_created_by=T2.employee_no
LEFT JOIN T2 sup ON sup.SID=T2.position_nbr
WHERE t1.record_create_date=current_date