EN
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';
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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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SELECT
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`salary`,
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IF(`salary` > 6000, 'high_salary', 'average_salary') AS 'salary_information'
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FROM `users`;
Result:

create_tables.sql
file:
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CREATE TABLE `users` (
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`id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
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`name` VARCHAR(50) NOT NULL,
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`surname` VARCHAR(50) NOT NULL,
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`department_id` INT(10) UNSIGNED,
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`salary` DECIMAL(15,2) NOT NULL,
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PRIMARY KEY (`id`)
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);
insert_data.sql
file:
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INSERT INTO `users`
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( `name`, `surname`, `department_id`, `salary`)
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VALUES
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('John', 'Stewart', 1, '3512.00'),
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('Chris', 'Brown', 2, '1344.00'),
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('Kate', 'Lewis', 3, '6574.00'),
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('Ailisa', 'Gomez', NULL, '6500.00'),
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('Gwendolyn', 'James', 2, '4200.00'),
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('Simon', 'Collins', 4, '3320.00'),
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('Taylor', 'Martin', 2, '1500.00'),
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('Andrew', 'Thompson', NULL, '2100.00');