# Postgres

PostgreSQL (opens new window), also known as Postgres, is a free and open-source relational database management system emphasizing extensibility and SQL compliance.

🔑 Credentials

You can find authentication information for this node here.

# Basic Operations


  • Execute an SQL query
  • Insert rows in database
  • Update rows in database

# Example Usage

This workflow allows you to run an SQL query on a Postgres instance. You can also find the workflow (opens new window) on n8n.io. This example usage workflow would use the following nodes.

The final workflow should look like the following image.

A workflow with the Postgres node

# 1. Start node

The start node exists by default when you create a new workflow.

# 2. Postgres node (Execute Query)

  1. First of all, you'll have to enter credentials for the Postgres node. You can find out how to do that here.
  2. Select 'Execute Query' from the Operation dropdown list.
  3. Enter the following SQL query in the Query field: CREATE TABLE test (id INT, name VARCHAR(255), PRIMARY KEY (id));.
  4. Click on the Node tab and toggle Always Output Data to true.
  5. Click on Execute Node to run the node.

Using the Postgres node to create a table

# 3. Set node

  1. Click on the Add Value button and select 'Number' from the dropdown list.
  2. Enter id in the Name field.
  3. Click on the Add Value button and select 'String' from the dropdown list.
  4. Enter name in the Name field.
  5. Enter the value for the name in the Value field.
  6. Click on Execute Node to run the node.

Using the Set node to set data to be inserted by the Postgres node

# 4. Postgres1 node (Insert)

  1. Select the credentials that you entered in the previous Postgres node.
  2. Enter test in the Table field.
  3. Enter id, name in the Columns field.
  4. Click on Execute Node to run the node.

Using the Postgres node to insert data into a table

# FAQs

# How to specify the data type of a column?

To specify the data type of a column, append the column name with :type, where type is the data type of that column. For example, if you want to specify the type int for the column id and type text for the column name, you can use the following snippet in the Columns field: id:init,name:text.

# Further Reading