Confirming Query Optimization In SQL | EXPLAIN And EXPLAIN ANALYZE | Understanding SQL Performance

Published: 25 November 2024
on channel: Select Star

883

Namastey All,

Welcome to Select Star. Today we will be discussing how to check if your query has been optimized or not after following various optimization steps.

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Script for table creation :
CREATE TABLE user_logins (
userid CHAR(1),
logintime TIMESTAMP
);

INSERT INTO user_logins (userid, logintime) VALUES
('A', '2024-01-01 08:30:00'),
('B', '2024-01-01 09:00:00'),
('A', '2024-01-02 10:00:00'),
('C', '2024-01-02 08:45:00'),
('B', '2024-01-03 11:15:00'),
('A', '2024-01-04 12:00:00'),
('C', '2024-01-04 09:30:00'),
('D', '2024-01-05 07:00:00'),
('D', '2024-01-05 08:15:00'),
('B', '2024-01-06 10:45:00'),
('C', '2024-01-06 08:00:00');

SELECT * FROM user_logins;

Happy Querying

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