Select statement with a particular logic - sql

Question

I have a table in Microsoft Dynamics AX ERP Database of SQL Server 2008 R2, which has some rows, there is a field named qty in table, some rows have negative qty and some rows have positive quantity. There is another field TransactionID, now I want to select all those TransactionIDs which have negative qty, AND also those TransactionIDs which have some rows with positive QTys and negative qtys too.
TransactionID is a foreign key field of a master table.
So far I wrote below code which is not working.
select * from RBOTRANSACTIONSALESTRANS main where main.qty < 0
and main.DATAAREAID = 'DAT'
and exists
(
select 1 from RBOTRANSACTIONSALESTRANS where QTY > 0
and RBOTRANSACTIONSALESTRANS.DATAAREAID = main.DATAAREAID
and RBOTRANSACTIONSALESTRANS.STORE = main.STORE
and RBOTRANSACTIONSALESTRANS.TERMINALID = main.TERMINALID
)
order by main.TRANSACTIONID

Answer 1

A recap, you want to select all rows for which there exists at least one row with the same TransactionID that has a negative quantity?
select *
from RBOTRANSACTIONSALESTRANS main
where main.DATAAREAID = 'DAT'
and exists
(
select 1
from RBOTRANSACTIONSALESTRANS sub
where sub.QTY < 0
and sub.DATAAREAID = main.DATAAREAID
and sub.STORE = main.STORE
and sub.TERMINALID = main.TERMINALID
and sub.TRANSACTIONID = main.TRANSACTIONID
)
order by main.TRANSACTIONID
The main difference is, that you had a main.QTY < 0 check. And I added sub.TRANSACTIONID = main.TRANSACTIONID.

Answer 2

more or less the query should be like that
select * from
(
select tansactionID, sum(qty) as q, sum(abs(qty)) as q2
from table2 T
group by tansactionID ) T
where q<> q2
post the schema so i can adjust it

Answer 3

JOINed query defines TRANSACTIONID according your conditions (see HAVING conditions). So after JOIN you filter your table to leave only these TRANSACTIONID.
select t.* from RBOTRANSACTIONSALESTRANS t
join
(
select TRANSACTIONID,min(main.qty),max(main.qty)
from RBOTRANSACTIONSALESTRANS main
GROUP BY TRANSACTIONID
HAVING (max(main.qty) < 0)
or
((min(main.qty) < 0) and (max(main.qty) > 0))
) t1 on (t.TRANSACTIONID=t1.TRANSACTIONID)
UPD After you comment under your question I think you need to use only this condition in the inner query:
HAVING not (min(main.qty) < 0)

Answer 4

It seems to me that you may be over complicating the issue. If I am understanding the criteria correctly you want All rows where
the quantity is < 0
OR
the quantity is < 0 AND a row exists with the same transaction ID
with a negative quantity
So to start
SELECT *
FROM RBOTRANSACTIONSALESTRANS tr
WHERE tr.DATAAREAID = 'DAT'
AND tr.Qty < 0
Would satisfy the first criterion. The following would do the second.
SELECT *
FROM RBOTRANSACTIONSALESTRANS tr
WHERE tr.DATAAREAID = 'DAT'
AND tr.Qty > 0
AND EXISTS
( SELECT 1
FROM RBOTRANSACTIONSALESTRANS neg
WHERE neg.TransactionID = tr.TransactionID
AND neg.DATAAREAID = 'DAT'
AND neg.Quantity < 0
)
This can be combined as
SELECT *
FROM RBOTRANSACTIONSALESTRANS tr
WHERE tr.DATAAREAID = 'DAT'
AND ( tr.Qty < 0
OR EXISTS
( SELECT 1
FROM RBOTRANSACTIONSALESTRANS neg
WHERE neg.TransactionID = tr.TransactionID
AND neg.DATAAREAID = 'DAT'
AND neg.Quantity < 0
)
)
However, the first clause is redundant since any row where the quantity is < 0 will also be satisfied by the EXISTS clause. So this can be simplified to:
SELECT *
FROM RBOTRANSACTIONSALESTRANS tr
WHERE tr.DATAAREAID = 'DAT'
AND EXISTS
( SELECT 1
FROM RBOTRANSACTIONSALESTRANS neg
WHERE neg.TransactionID = tr.TransactionID
AND neg.DATAAREAID = 'DAT'
AND neg.Quantity < 0
)