Change MySQL Field Comment

In MySQL, you can use the ALTER TABLE statement to modify the comment of a field. Here is the specific syntax:

ALTER TABLE 表名 MODIFY COLUMN 列名 数据类型 COMMENT '新注释';

Here, ‘table name’ refers to the name of the table to be modified, ‘column name’ identifies the specific field whose comment is to be changed, ‘data type’ indicates the data type of the field, and ‘new comment’ is the new comment to be set.

For example, if there is a table called users with a field named username, and we want to change its comment to “Username”, we can use the following statement:

ALTER TABLE users MODIFY COLUMN username VARCHAR(20) COMMENT '用户名';

After executing the statement above, the comment for the username field will be changed to “Username”.