Languages
[Edit]
EN

PostgreSQL - Drop table if exists

0 points
Created by:
Dirask JS Member
3640

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

Quick solution:

DROP TABLE IF EXISTS "table_name";

Practical example

To show how the DROP TABLE IF EXISTS 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 IF EXISTS "users";

Output:

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

 

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');

PostgreSQL - problems

PostgreSQL - Drop table if exists
Native Advertising
🚀
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.

❤️💻 🙂

Join