SQL ALTER TABLE Keyword
ALTER TABLE
The ALTER TABLE command adds, deletes, or
modifies columns in a table.
The ALTER TABLE command also adds and
deletes various constraints in a table.
The following SQL adds an "Email" column to the "Customers" table:
Example
ALTER TABLE Customers
ADD Email varchar(255);
The following SQL deletes the "Email" column from the "Customers" table:
Example
ALTER TABLE Customers
DROP COLUMN Email;
Copyright 1999-2023 by Refsnes Data. All Rights Reserved.