change column name mysql

ALTER TABLE tableName CHANGE `oldcolname` `newcolname` datatype(length);

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

ALTER TABLE tableName RENAME COLUMN "oldcolname" TO "newcolname" datatype(length);

ALTER TABLE table_name CHANGE old_column_name new_column_name datatype(length);

alter table product change price price_kg float;