sql modify column

  ALTER TABLE Customers
ADD Email varchar(255);
 

ALTER TABLE table_name
  RENAME COLUMN old_name TO new_name;

ALTER TABLE table_name
ALTER COLUMN column_name datatype;
--ex.
ALTER TABLE Customers
ADD Email varchar(255);

ALTER TABLE `Table Name` MODIFY COLUMN `Column Name` Datatype(Size);

-- ORACLE 18c
ALTER TABLE table_name 
MODIFY column_name datatype;

-- Example
ALTER TABLE product
MODIFY description VARCHAR2(500 char);

ALTER TABLE table_name
ALTER COLUMN column_name datatype;

ALTER TABLE table_name

ALTER COLUMN column_name datatype;