I have a list of transactions in a table for a user which records, the UserID, DateTime, TransactionType and Value. TransactionID is the Primary Key auto increment 1. The TransactionType defines a Deposit (1) or Withdrawal (2) so all values are positive in the table. I am trying to create a statement of account with a running total.
TransactionID UserID DateTime TransactionTypeID Value
1 3112 01-04-2016 12:00 1 5.00
3 3112 01-04-2016 13:00 2 2.00
5 3112 01-04-2016 13:25 2 1.00
8 3112 02-04-2016 12:00 1 10.00
9 3112 02-04-2016 12:35 2 4.00
Basically I want to create a running statement of account query with a Total value to create:
DateTime TransactionTypeID Deposit Withdrawal Balance
01-04-2016 12:00 1 5.00 5.00
01-04-2016 13:00 2 2.00 3.00
01-04-2016 13:25 2 1.00 2.00
02-04-2016 12:00 1 10.00 12.00
02-04-2016 12:35 2 4.00 8.00
I have tried using OUTER APPLY to select the previous transaction but with no prevail in a single query. Any assistance would be appreciated
SELECT
[UserID], [DateTime],
T.[Value] *
(CASE
WHEN [TransactionTypeID] IN (1, -- deposit
2 -- withdrawal
)
THEN -1
ELSE 1
END),
T2.Value AS PrevValue
FROM
[Transaction] T
OUTER APPLY
(SELECT TOP 1 T2.[Value]
FROM [Transaction] T2
WHERE UserID = 3112
AND T2.[TransactionID] > T.TransactionID
ORDER BY T2.TransactionID) AS T2
WHERE
T.[UserID] = 3112
ORDER BY
T.[TransactionID] DESC
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