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Education

This is the Education section of the Command Prompt Website. Here you will find blogs specifically about how to use Postgres and related technologies.

How to Use REPEAT() Function in PostgreSQL

The REPEAT() function in Postgres is a string function that retrieves a string consisting of the given string repeated an ‘n’ number of times.

How to Get a Day From a Date in PostgreSQL

To get a day from a date, specify the “Day” as the first argument and a specific date, timestamp, or interval as the second argument to the EXTRACT().

Postgres SQRT() Function With Practical Examples

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

Postgres Modulo Function With Examples

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

Difference Between DIV() and MOD() Function in PostgreSQL

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.

PostgreSQL RIGHT() Function: Extract Characters From the Right of a String

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

How to Describe Postgres Tables Using SQL Shell (psql)

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

PostgreSQL LEFT() Function: Extract Characters From the Left of a String

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

How to Perform Division in PostgreSQL

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.

INITCAP: How to Capitalize the First Letter of Every Word in PostgreSQL

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.