Solving an Amazon SQL Interview Question on Notepad
In this video we will solve a Amazon SQL interview question on notepad. This will help all the job aspirants to understand how to solve on notepad.
script:
CREATE TABLE subscription_history (
customer_id INT,
marketplace VARCHAR(10),
event_date DATE,
event CHAR(1),
subscription_period INT
);
INSERT INTO subscription_history VALUES (1, 'India', '2020-01-05', 'S', 6);
INSERT INTO subscription_history VALUES (1, 'India', '2020-12-05', 'R', 1);
INSERT INTO subscription_history VALUES (1, 'India', '2021-02-05', 'C', null);
INSERT INTO subscription_history VALUES (2, 'India', '2020-02-15', 'S', 12);
INSERT INTO subscription_history VALUES (2, 'India', '2020-11-20', 'C', null);
INSERT INTO subscription_history VALUES (3, 'USA', '2019-12-01', 'S', 12);
INSERT INTO subscription_history VALUES (3, 'USA', '2020-12-01', 'R', 12);
INSERT INTO subscription_history VALUES (4, 'USA', '2020-01-10', 'S', 6);
INSERT INTO subscription_history VALUES (4, 'USA', '2020-09-10', 'R', 3);
INSERT INTO subscription_history VALUES (4, 'USA', '2020-12-25', 'C', null);
INSERT INTO subscription_history VALUES (5, 'UK', '2020-06-20', 'S', 12);
INSERT INTO subscription_history VALUES (5, 'UK', '2020-11-20', 'C', null);
INSERT INTO subscription_history VALUES (6, 'UK', '2020-07-05', 'S', 6);
INSERT INTO subscription_history VALUES (6, 'UK', '2021-03-05', 'R', 6);
INSERT INTO subscription_history VALUES (7, 'Canada', '2020-08-15', 'S', 12);
INSERT INTO subscription_history VALUES (8, 'Canada', '2020-09-10', 'S', 12);
INSERT INTO subscription_history VALUES (8, 'Canada', '2020-12-10', 'C', null);
INSERT INTO subscription_history VALUES (9, 'Canada', '2020-11-10', 'S', 1);
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