How to get multiple records by using group by caluse

Question

Description of table:
I have one table Exposureid(primary key),Name,Address,City,State,County,Zip,Occupation .
Description of Query Result that I want:
I wanrt all exposureid which has duplicate Address+City+State+Zip+County+Occupation as a single record
(those exposures that has same address and occupation )

Answer 1

The GROUP BY clause will give you a list of unique addresses. Adding HAVING COUNT(*) > 1 will give you all addresses that are used more than once.
A sub-select can then be used to determine which unique rows have these duplicates, e.g.
select
from table t1
where (t1.col1, t2.col2, t3.col3) in
( select
t2.col1, t2.col2, t2.col3
from table t2
group by
t2.col1, t2.col2, t2.col3
having count(*) > 1