This article will show the PostgreSQL SUBSTRING function using various examples.

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PostgreSQL, an open-source relational database system, provides several string manipulation functions, including the SUBSTRING function. The SUBSTRING function is used to extract a part of a string based on a specified starting position and, optionally, the length. This guide covers the syntax and various examples of using the SUBSTRING function, including using regular expressions and extracting data from table columns. Additional features and scenarios for using the function, such as sorting data and handling email addresses, are also explored.

Understanding PostgreSQL SUBSTRING function

Extract matching Substrings with SQL Regular Expression

Use a Negative number as starting position in the SUBSTRING function