如何重命名 maria DB 中的列名

Question

I am new to SQL, I was trying to change column name in my database's table. I am using 'xampp' with 'maria DB' (OS - Ubuntu 18.04)

I tried all of the followings:

ALTER TABLE subject RENAME COLUMN course_number TO course_id;
ALTER TABLE subject CHANGE course_number course_id;
ALTER TABLE subject CHANGE 'course_number' 'course_id';
ALTER TABLE subject  CHANGE COLUMN 'course_number'  course_id varchar(255);
ALTER TABLE subject CHANGE 'course_number' 'course_id' varchar(255);

But the only output I got was:

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'column course_number to course_id' at line 1

Could someone please tell me what is the correct answer. I have no idea what to do further.

Answer 1

Table names, column names, etc, may need quoting with backticks, but not with apostrophes ( ' ) or double quotes ( " ).

ALTER TABLE subject
    CHANGE COLUMN `course_number`   -- old name; notice optional backticks
                   course_id        -- new name
                   varchar(255);     -- must include all the datatype info

Answer 2

Starting with MariaDB 10.5.2 you should be able to do

ALTER TABLE subject RENAME COLUMN course_number TO course_id;

see https://mariadb.com/kb/en/alter-table/#rename-column

Answer 3

alter table "table_name" change column "old_name" "New_name" "datatype" ;

there is no need to use "TO" between old_name & New_name , datatype of new_name is must

eg - alter table student change column "id" "roll_no" "int" ;