ALTER TABLE DROP COLUMN

ALTER TABLE DROP COLUMN is a SQL statement in the DDL Statements category. Removes a column from an existing table. Irreversible — data is lost. The syntax is ALTER TABLE table_name DROP [COLUMN] column_name;. It returns table without column. A typical example: ALTER TABLE employees DROP COLUMN phone; -- Removes the phone column and all its data permanently A close relative is CREATE TABLE, which creates a new table in the database with specified columns, data types, and constraints. A close relative is ALTER TABLE, which modifies an existing table: add/drop columns, modify data types, rename, add/drop constraints. A close relative is DROP TABLE, which permanently removes a table and all its data from the database. Cannot be undone. More about this category: Data Definition Language — CREATE TABLE, ALTER TABLE, DROP TABLE, TRUNCATE, CREATE INDEX. Related DDL Statements entries: CREATE TABLE, ALTER TABLE, DROP TABLE, TRUNCATE TABLE, RENAME TABLE, CREATE DATABASE, DROP DATABASE, CREATE SCHEMA.