You can use derived tables, e.g.

SELECT cust.Customer_id, cust.Customer_name, v.visit_date,;
v.location_id, v.Visits_id;
FROM ;
hpmg!Customer cust ;
INNER JOIN hpmg!Visits v ;
ON cust.Customer_id = v.Customer_id;
inner join (select Customer_id, visit_date, location_id ;
from  hpmg!Visits ;
WHERE visit_date between  ?StartOfTheYear and ?EndOfTheYear ;
GROUP BY Customer_id, visit_date, location_id ;
HAVING COUNT(*) > 1 ) as MultipleVisits ON v.Customer_id = MultipleVisits.Customer_ID ;
AND v.visit_date = MultipleVisits.visit_date and v.Location_id = MultipleVisits.Location_id;
WHERE v.visit_date between  ?StartOfTheYear and ?EndOfTheYear 

I also suggest to use date column as is if you have index on date column and not on year(date) (In the latter case use your original where).

>I think I'm doing something dumb here - 3 select statements but seems like there should be a way to do this in just one????
>
>First table: Customer
>customer_id
>customer_name
>
>Second table: Visits
>visits_id
>customer_id
>visit_date
>location_id
>
>...what I want is customer_id, customer_name, visit_id, visit_date and location_id for all location_id's where a customer visited more than once on the same day for a particular year.
>This is what I'm doing now - but like I said, seems like there should be a better way.
>----------------------------------------------------------
>
>

>SELECT Customer.Customer_id, Customer.Customer_name, Visits.visit_date,;
>  Visits.location_id, Visits.Visits_id, 0 AS vcount;
> FROM ;
>     hpmg!Customer ;
>    LEFT OUTER JOIN hpmg!Visits ;
>   ON  Customer.Customer_id = Visits.Customer_id;
> WHERE  YEAR(Visits.visit_date) = ( ?lnYear) INTO CURSOR curHold_1
>

>
>

> SELECT Customer.Customer_id, Visits.visit_date, Visits.location_id,;
>  COUNT(*) AS vcount;
> FROM ;
>     hpmg!Customer ;
>    LEFT OUTER JOIN hpmg!Visits ;
>   ON  Customer.Customer_id = Visits.Customer_id;
> WHERE  YEAR(Visits.visit_date) = ( 2015 );
> GROUP BY Customer.Customer_id, Visits.visit_date, Visits.location_id;
> HAVING  ( vcount ) > ( 1 ) INTO CURSOR curHold_2
>

>
>

> SELECT curHold_1.Customer_id, curHold_1.Customer_name, curHold_1.Visits_id,;
>  curHold_1.visit_date, curHold_1.location_id;
> FROM ;
>     curHold_1 ;
>    INNER JOIN curHold_2 ;
>   ON  curHold_1.Customer_id = curHold_2.Customer_id;
> WHERE (  curHold_1.Customer_id = curHold_2.Customer_id;
>   AND  curHold_1.visit_date = curHold_2.visit_date );
>   AND  curHold_1.location_id = curHold_2.location_id
>

>
>...I suppose I could leave it this way but I'd really like a cleaner way to do it.