SQL COLUMN Keyword
ALTER COLUMN command is used to change the data type of a column in a table.
The following SQL changes the data type of the column named "BirthDate" in the "Employees" table to type year:
ALTER COLUMN BirthDate year;
DROP COLUMN command is used to delete a column in an
The following SQL deletes the "ContactName" column from the "Customers" table:
DROP COLUMN ContactName;