Add end date to a balance amount table | SQL interview question

 DML Script:

DROP TABLE IF EXISTS Balances;

GO


CREATE TABLE Balances

(

CustomerID   INTEGER,

BalanceDate  DATE,

Amount       MONEY NOT NULL,

PRIMARY KEY (CustomerID, BalanceDate)

);

GO


INSERT INTO  Balances (CustomerID, BalanceDate, Amount) VALUES

(1001,'10/11/2021',54.32),

(1001,'10/10/2021',17.65),

(1001,'9/18/2021',65.56),

(1001,'9/12/2021',56.23),

(1001,'9/1/2021',42.12),

(2002,'10/15/2021',46.52),

(2002,'10/13/2021',7.65),

(2002,'9/15/2021',75.12),

(2002,'9/10/2021',47.34),

(2002,'9/2/2021',11.11);

GO



SELECT * FROM Balances

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