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In this step-by-step tutorial, we will guide you through the process of installing PostgreSQL on an openSUSE system.
The FROM_DAYS() function in MySQL converts a day number to a DATE value. It is useful for calculating dates based on an integer day number.
The FORMAT() function in MySQL allows you to format a number to a specific format. It is useful for formatting numbers for display purposes.
Install PostgreSQL on macOS with Homebrew, start its service, create a database owned by your app role, and connect with psql.
Install supported PostgreSQL 18 on FreeBSD with pkg, initialize its database cluster, and enable the service. PostgreSQL 13 is no longer supported.
The EXTRACT() function in MySQL retrieves a specific component from a date or datetime value. This can extract elements like day, month, year, etc.
EXTRACT()
Install PostgreSQL 18 on Fedora 44 with DNF, initialize the cluster, enable the service, and create a user and database.
The DAYOFYEAR() function in MySQL returns the day of the year for a given date. This can calculate the numeric day from 1 to 365 (or 366 in leap years).
DAYOFYEAR()
Install PostgreSQL on Debian 12 Bookworm. Standard support ended in July 2026, with Debian LTS scheduled through June 2028; links to the Debian 13 guide are included.
The DAYOFWEEK() is a MySQL function that returns the weekday index for a given date. The days are indexed starting with 1 for Sunday through 7 for Saturday.
DAYOFWEEK()