从两个表中选择字段sql

Question

I have the following query to select records from database.

It is working fine at the moment.

select Barcode,systemqty from items where barcode in 
(select itibar from itrans group by itibar having sum(itiqty) <> systemqty) 
 and  brand='BRO'

Now, I need to select another field from itrans table like this

 select Barcode,systemqty,itibar from items where barcode in 
(select itibar from itrans group by itibar having sum(itiqty) <> systemqty) 
 and  brand='BRO'

The above code results in an error.

Answer 1

As Barcode = itibar in your example, you could just include barcode

select Barcode,
        systemqty, 
        barcode as itibar 
from items 
where barcode in 
(
select itibar 
from itrans 
group by itibar 
having sum(itiqty) <> systemqty

) 
and  brand='BRO'

Alternatively you can change it into a join to allow you to access more columns from itrans in your select statement:

select Barcode,
        systemqty, 
        itibarrows.itibar 
from items 
inner join (
    select itibar 
    from itrans 
    group by itibar 
    having sum(itiqty) <> systemqty
    ) itibarrows
    on itibarrows.itibar = items.barcode
where brand='BRO'