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Renaming a column in MySQL

Database
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MySQL
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Cookbooks
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Tables Cookbooks
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Column Cookbooks
schedule Jul 1, 2022
Last updated
local_offer MySQL
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tocTable of Contents
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We can permanently rename a column in MySQL using the below syntax:

ALTER TABLE table_name CHANGE old_column_name new_column_name data_type;

Example

Consider the following table containing information about some students:

ID

Name

Age

Hobby

1

Alex

30

Programming

2

Bob

15

Programming

3

Cathy

20

Swimming

The above table can be created using the code here.

To check the current table characteristics:

DESCRIBE info;
+-------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------+--------------+------+-----+---------+----------------+
| id | int unsigned | NO | PRI | NULL | auto_increment |
| name | varchar(20) | YES | | NULL | |
| age | int | YES | | NULL | |
| hobby | varchar(20) | YES | | NULL | |
+-------+--------------+------+-----+---------+----------------+

To rename the column name to first_name:

ALTER TABLE info CHANGE name first_name VARCHAR(20);
Query OK, 0 rows affected (0.01 sec)
Records: 0 Duplicates: 0 Warnings: 0

To confirm the column has indeed been renamed:

DESCRIBE info;
+------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+------------+--------------+------+-----+---------+----------------+
| id | int unsigned | NO | PRI | NULL | auto_increment |
| first_name | varchar(20) | YES | | NULL | |
| age | int | YES | | NULL | |
| hobby | varchar(20) | YES | | NULL | |
+------------+--------------+------+-----+---------+----------------+
robocat
Published by Arthur Yanagisawa
Edited by 0 others
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