ALTER TABLE `members` CHANGE COLUMN `full_names` `fullname` varchar(100) NOT NULL;
RENAME TABLE old_name TO new_name;
-- or
ALTER TABLE old_name RENAME TO new_name;
-- or
ALTER TABLE old_name RENAME new_name;
ALTER TABLE employees RENAME COLUMN id TO employ_id;
ALTER TABLE your_table_name RENAME COLUMN original_column_name TO new_column_name;
ALTER TABLE table_name CHANGE old_column_name new_column_name datatype(length);
ALTER TABLE tableName CHANGE `oldcolname` `newcolname` datatype(length);
(you can remove the backticks if it doesn't work)
ALTER TABLE `members` ADD COLUMN `credit_card_number` VARCHAR(25);