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Adding a default column value in MySQL

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MySQL
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Tables Cookbooks
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Column Cookbooks
schedule Jul 1, 2022
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local_offer MySQL
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We can add a default column value in MySQL using the DEFAULT constraint.

Example

To create a table with the default value for age as 20:

CREATE TABLE students (
name VARCHAR(30),
age INT DEFAULT 20
);

To insert a record without specifying the age, and then print the results:

INSERT INTO students (name) VALUES ('bob');
SELECT * FROM students;
+------+------+
| name | age |
+------+------+
| bob | 20 |
+------+------+

We can see that students for whom we do not provide an age value will automatically be inserted as 20 years old.

robocat
Published by Arthur Yanagisawa
Edited by 0 others
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