SQL Logic: Write a query to find the running sum of Amount for each customer by date.

Описание: CREATE TABLE Transactions (
CustID INT,
TxnDate DATE,
Amount INT
);


INSERT INTO Transactions (CustID, TxnDate, Amount) VALUES
(1, '2024-01-01', 100),
(1, '2024-01-05', 200),
(1, '2024-01-10', 300),
(2, '2024-01-02', 150),
(2, '2024-01-06', 250),
(3, '2024-01-03', 400),
(3, '2024-01-08', 100);



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