how to rename columns in mysql code example

Example 1: rename column mysql

ALTER TABLE tableName CHANGE `oldcolname` `newcolname` datatype(length);
(you can remove the backticks if it doesn't work)

Example 2: how to change column name in mysql

alter table product change price price_kg float;

Example 3: rename table column name in mysql

ALTER TABLE table_name CHANGE old_column_name new_column_name datatype(length);