Postgres and Open Source Experts

To remove/delete a password for a user in Postgres, execute the “ALTER USER user_name PASSWORD NULL;” command. Replace user_name with the username of your choice.

UPDATE JOIN in PostgreSQL is used to alter the values of the tables using the reference of the other table having a common column available in both tables.

A database transaction in PostgreSQL is used to perform multiple steps at once and confirm it using the COMMIT clause or reverse it with the ROLLBACK keyword.

NATURAL JOIN supports INNER, LEFT, and RIGHT JOINs but uses INNER by default as it is used to combine multiple tables having the same field names.

FULL OUTER JOIN combines the working of both LEFT and RIGHT JOINs to produce a result table containing matched and unmatched results from the tables.

DELETE JOIN is not directly supported by the PostgreSQL database but a DELETE statement with either USING or WHERE clauses can be used for this purpose.

Connect to the AWS RDS PostgreSQL in pgAdmin and create a database from there. Use a Query Tool to perform database operations.

Visit the AWS RDS dashboard from the AWS account and click the “Create database” button to configure the DB using a PostgreSQL engine and its latest version.

SELF JOIN is used in the PostgreSQL database to join a table to itself when tables are created in a hierarchy fashion to apply queries on it.

Create an AWS RDS DB instance from the service dashboard and use PostgreSQL as its engine. Use Endpoint and username in the “psql” command to connect to it.