We can alter an existing table structure visually with TablePlus, but we can do that using SQL too, using the ALTER TABLE command, followed by the alteration you want to make:

ALTER TABLE people ADD COLUMN born_year INTEGER;

This will add a new column with empty values:

We can drop a column in this way:

ALTER TABLE people DROP COLUMN born_year;

Lessons in this unit:

0:	Introduction
1:	Using TablePlus
2:	Create a Postgres database
3:	Create a new table
4:	Add data to a table
5:	Query data with SELECT
6:	Delete data from the database
7:	Update data with UPDATE
8:	Null constraints
9:	Unique and primary keys
10:	▶︎ Updating a table structure
11:	Joins