select c1.*
from #categories1 c1
where not exists(select 1
                 from #categories2 c2
 ...

These 2 queries produce the output you're looking for.  It should be said this is not a properly normalized data model.  There seemingly are "non-modelled" relationship(s) in the data which...

Nicely done The Dixie Flatline 🙂

What about checking @@rowcount?  This way 0 would only show up if there are no rows

SELECTCount(InvNo) AS RecordCount, BatchID
FROMBatchOrders
GROUP BY BatchID;
if @@ROWCOUNT=0
    SELECT 0,...

COUNT doesn't return 0 because you've also requested BatchID in the SELECT list.  The FROM clause is evaluated first and there are no rows.  On its own COUNT will always...

• This reply was modified 3 years, 1 month ago by  Steve Collins.

Ok, Category appears to not be a reserved word and appears in white.  Period and Value are both blue.  So it's brackets, no brackets, and brackets instead of brackets, brackets,...

To subtract the values the rows would need to be joined in some way.  Since maybe some Category(ies) is/are not always present for each Period you could try OUTER APPLY...

Like what Mr Brian Gale described you could try a combination of LEAD and LAG functions

with lead_lag_cte as (
    select *,
   ...

Interesting news.  Thank you.  Please reach out if there's anything I could do that might help.  Regarding the forum there was never a UI built so it's currently DDL, SQL...

That's really awesome Steve.  I know a lot of people are going to be happy you've picked up the ball with this and in this way too.  That's awesome.  It's...

It was very quick, and I knew about it yesterday, but didn't really do much other than give a vote to try. Still amazed it happened.

Comments, suggestions,...

What needs to be dynamic?

Maybe something like this

with part_cte as (
    select PartId,
           sum(case when CodeType=1885 then 1...

Yes it could be put in the same function

It's true...