Postgres and Open Source Experts

In PostgreSQL, the SQRT() is a built-in mathematical function that accepts a positive numeric value and retrieves its square root.

PostgreSQL provides a built-in math function named MOD() that accepts numeric values as arguments, performs division, and retrieves the remainder after division.

The DIV() and MOD() functions in Postgres perform the division on numeric values. However, the DIV() function retrieves a quotient while the MOD() function retrieves the remainder.

The RIGHT() function takes a string and the number of characters to extract as arguments and retrieves the extracted/modified string.

SQL Shell supports various commands and queries to describe the Postgres tables, such as “\d”, “\d+”, information_schema, etc.

The LEFT() function takes a string and the number of characters to extract as arguments and retrieves the extracted/modified string.

Postgres offers several built-in functions and operators that are used to perform division on different numeric values, such as the “/” operator, DIV() function, MOD() function, etc.

The INITCAP() is a built-in string function that accepts a string as an argument and converts the first letter of every word into uppercase and the remaining letters into lowercase.

Welcome back to our Citus blog series! Previously, we introduced Citus, reviewed use cases, reviewed Citus structure, and installed Citus alongside PostgreSQL 14. This post will focus on configuring settings to make sure Citus is communicating between all instances.

To extract the day name from a specific date, you need to pass the date/timestamp as a first argument and a valid day format as the second argument to the “TO_CHAR()” function.