Question

I have 2 tables that I’m trying to combine in order to do a group by function on them. The reason I’m dealing with this issue is that combined the 2 tables are > than the 10 GB database limit in SQL Server Express (each is ~ 9 GB). The second table is just a continuation of the first. It looks like this:

  CustId        Sale
    001         4.25
    002        15.24
    003         8.78
    004       122.99
    005        44.80
    ...         ...

If it was one table I’d just use something like this:

select CustId, sum(Sale) sumSale
from table1
group by CustId

Is there a way to combine lengthwise instead of width-wise?

Answer 1

You can use a union:

select CustId, sum(Sale) sumSale
from (
    select CustId, Sale
    from table1
    union all
    select CustId, Sale
    from table2)
group by CustId