Postgres and Open Source Experts

To uninstall Postgres from your Ubuntu operating system, open the terminal and run the “sudo apt remove postgresql postgresql-contrib” command.

In PostgreSQL, the SELECT statement, information_schema, \d command, and pg_typeof() function are used to check the data type of a column.

In PostgreSQL, a table column created with a NOT NULL constraint accepts only non-null values. It can be added when creating a new or altering an existing table.

In PostgreSQL, the ALTER DATABASE command is used with the collaboration of the OWNER TO clause to change the database owner.

Postgres is becoming increasingly popular every day due to its stunning features. This post explained how to download, install, and use Postgres on macOS.

To install PostgreSQL on your Ubuntu operating system, run the “sudo apt install postgresql postgresql -contrib” command.

psycopg is a Postgres Python connector that allows Python programs to access Postgres databases. It is used to perform various operations on Postgres database via python.

In PostgreSQL, the “ILIKE” operator is used to fetch/query the data based on pattern matching. The ILIKE operator queries the data case-insensitively.

In Postgres, the DROP USER statement is used to drop a single user or multiple users simultaneously. Use IF EXISTS option to check the existence of a user.

Use the ALTER USER or ALTER ROLE statement to change/modify the password of a Postgres user. You can use the VALID UNTIL clause to specify the password’s expiry date and time.