That's something you'll need to check for manually (for now). Syntax: DROP TABLE [IF EXISTS] table_name [CASCADE | RESTRICT]; Let's analyze the above syntax: We specify the table name after the DROP TABLE keyword to remove the table permanently from the database. How to Write a Case Statement in PostgreSQL - PopSQL After a long time of waiting, PostgreSQL 9.5 introduced INSERT ON CONFLICT [DO UPDATE] [DO NOTHING]. I have a table that contains a large amount of data which gets updated daily with either new data, or data (rows) that already exist in the table but need updating. ALTER TABLE — Presto 0.273.1 Documentation 5 Ways to Check if a Table Exists in PostgreSQL Types and Roles If Not Exists in PostgreSQL - Lev Lazinskiy In certain cases, it can also speed up some of your queries. In this tutorial, we are going to learn the PostgreSQL UPDATE command for updating the current data in a table.. 2. PostgreSQL has a DROP TABLE statement that is used to remove an existing table or tables from the database. CREATE TABLE IF NOT EXISTS tbl_Test (Rno INT); NOTICE: relation "tbl_test" already exists, skipping. Unlike MySQL et al., PostgreSQL does not support the CREATE .IF NOT EXISTS syntax for databases. where username is the name of the user you would like to drop from PostgreSQL. In this article, we'll discuss the Postgres EXISTS operator and its opposite, the NOT EXISTS operator. When SELECT, INSERT, DELETE, or UPDATE is issued, the rules for that event are examined in an unspecified order. Here's an example to demonstrate: DROP TABLE IF EXISTS t1; That statement drops a table called t1 if it exists. The following query will retrieve records from items table based on company table. We used SELECT 1 in the subquery to improve performance because the resulting set of columns has nothing to do with the EXISTS condition (only the returned row counts).