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MySQL - IF() function example
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In this article, we would like to show you IF() function example in MySQL.
Quick solution:
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SELECT IF(condition, if_true, if_false);
In this example, we will check two conditions, the first one will return true, and the second one will return false.
Query:
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SELECT IF(1000 > 1, 'condition1_true', 'condition1_false') AS 'condition1_check';xxxxxxxxxx1
SELECT IF(1000 < 1, 'condition2_true', 'condition2_false') AS 'condition2_check';Result:
To show you how IF() function works, we will use the following table:
Note:
At the end of this article you can find database preparation SQL queries.
In this example, we will display salary column from users table and salary_information which is created with IF() function.
Query:
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SELECT2
`salary`,3
IF(`salary` > 6000, 'high_salary', 'average_salary') AS 'salary_information'4
FROM `users`;Result:
create_tables.sql file:
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CREATE TABLE `users` (2
`id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,3
`name` VARCHAR(50) NOT NULL,4
`surname` VARCHAR(50) NOT NULL,5
`department_id` INT(10) UNSIGNED,6
`salary` DECIMAL(15,2) NOT NULL,7
PRIMARY KEY (`id`)8
);insert_data.sql file:
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INSERT INTO `users`2
( `name`, `surname`, `department_id`, `salary`)3
VALUES4
('John', 'Stewart', 1, '3512.00'),5
('Chris', 'Brown', 2, '1344.00'),6
('Kate', 'Lewis', 3, '6574.00'),7
('Ailisa', 'Gomez', NULL, '6500.00'),8
('Gwendolyn', 'James', 2, '4200.00'),9
('Simon', 'Collins', 4, '3320.00'),10
('Taylor', 'Martin', 2, '1500.00'),11
('Andrew', 'Thompson', NULL, '2100.00');