Vol. I · A Postgres HandbookTwelve chapters · · 756 queries

The Query & the Schema

A reading-room reference for writing PostgreSQL by hand — selects to window functions, with the schema in plain view.

IntermediateBasic SELECT

Drop a column

SQL

ALTER TABLE employees 
DROP COLUMN contact_number;

Tested against PostgreSQL 16

Note

“Permanently removes the column and its data. Cannot be undone unless you have a backup or transaction.