COLUMN Keyword
The column keyword is used when we want to modify any column or delete any column.
ALTER COLUMN
The Alter Column is used to modify the column data type.
ALTER TABLE <TABLE_NAME> ALTER COLUMN <COLUMN_NAME> <DATATYPE>;
Example
ALTER TABLE Employees
ALTER COLUMN Emp_DOB Date;
DROP COLUMN
The Drop Column is used to delete the column of an existing table.
ALTER TABLE <TABLE_NAME> DROP COLUMN <COLUMN_NAME>;
Example
ALTER TABLE Employee DROP COLUMN Emp_Contact;
Summary
The column keyword is used when we want to modify any column or delete any column.