Languages
[Edit]
EN

PostgreSQL - Drop table

0 points
Created by:
Dirask JS Member
3460

In this article, we would like to show you how to DROP TABLE in PostgreSQL.

Quick solution:

DROP TABLE "table_name";

Practical example

To show how the DROP TABLE statement works, we will use the following table:

PostgreSQL - example data used with DROP TABLE statement
PostgreSQL - example data used with DROP TABLE statement

Note:

At the end of this article you can find database preparation SQL queries.

Example 

In this example, we will delete the users table.

Query:

DROP TABLE "users";

Output:

PostgreSQL - DROP TABLE result in HeidiSQL (before)
PostgreSQL - DROP TABLE result in HeidiSQL (before)
PostgreSQL - DROP TABLE result in HeidiSQL (after)
PostgreSQL - DROP TABLE result in HeidiSQL (after)

Popular error

If you try to drop a table that already exists with DROP TABLE query you will get an error:

PostgreSQL - SQL Error: Unknown table 'table_name'
PostgreSQL - SQL Error: Unknown table 'table_name'

If you try to DROP TABLE IF EXISTS you will get a warning instead:

PostgreSQL - Note: Unknown table...
PostgreSQL - Note: Unknown table 'table_name'

Note:

For more information go to this article: PostgreSQL - Drop table if exists.

Database preparation

create_tables.sql file:

CREATE TABLE "users" (
	"id" SERIAL,
	"name" VARCHAR(50) NOT NULL,
	"surname" VARCHAR(50) NOT NULL,
	"department_id" INTEGER,
    "salary" DECIMAL(15,2) NOT NULL,
	PRIMARY KEY ("id")
);

insert_data.sql file:

INSERT INTO "users"
	( "name", "surname", "department_id", "salary")
VALUES
	('John', 'Stewart', 1, '3512.00'),
	('Chris', 'Brown', 2, '1344.00'),
	('Kate', 'Lewis', 3, '6574.00'),
	('Ailisa', 'Gomez', NULL, '6500.00'),
	('Gwendolyn', 'James', 2, '4200.00'),
	('Simon', 'Collins', 4, '3320.00'),
	('Taylor', 'Martin', 2, '1500.00'),
	('Andrew', 'Thompson', NULL, '2100.00');

Related posts

PostgreSQL

Native Advertising
­čÜÇ
Get your tech brand or product in front of software developers.
For more information Contact us
Dirask - we help you to
solve coding problems.
Ask question.

ÔŁĄ´ŞĆ­čĺ╗ ­čÖé

Join