ALTER TABLE ... ADD COLUMN

Add a column to a table

schema:scott

This is in the SQL standard ALTER TABLE The term COLUMN is optional.

DROP TABLE a

CREATE TABLE a(x INTEGER, y INTEGER);
INSERT INTO a VALUES (1,2);

ALTER TABLE a ADD COLUMN z INTEGER;
SELECT * FROM a;

ALTER TABLE a ADD z INTEGER;
SELECT * FROM a;

ALTER TABLE documentation. DB2 seemingly does not permit this operation - any help would be appreciated.

Sybase and SQL Server do not permit the COLUMN keyword.

ALTER TABLE

CREATE and DROP Operations

CREATE a new table

DROP a table

Composite primary key

CREATE a foreign key

CREATE a VIEW

Autonumber fields

ALTER TABLE ... ADD COLUMN

ALTER TABLE ... DROP COLUMN

ALTER TABLE ... ADD constraint

CREATE TABLE problems: Invalid column name.

CREATE TABLE problems: Insufficient privileges.

CREATE TABLE problems: Table already exists.

DROP TABLE problems: Foreign key references.

CREATE TABLE problems: Foreign key references.

Rename column