Understanding PostgreSQL SUBSTRING function

SQL Substring function overview

Oracle Substring function overview with examples

Substring in Java: Examples, Methods and Applications

Which MySQL string function is used to extract a substring from a given string based on a specified starting position and length? - Informatics Practices | Shaalaa.com

5 Ways to Find the Index of a Substring in Python | Built In

JavaScript Substring Examples - Slice, Substr, and Substring Methods in JS

PowerShell et Substring : extraire une chaîne d’une chaîne | IT-Connect

SUBSTRING, PATINDEX and CHARINDEX string functions in SQL queries