Advanced SQL Techniques for Handling Unstructured Data | by Jiayan Yin | January, 2025

The main difference between these two tables is whether the data is properly organized in rows and columns and is presented only in numbers or in text. Because of this difference, the data in Table_1 is called structured data while the data in Table_2 is classified as unstructured data.

Unstructured data refers to information that does not have a predetermined structure or format. It is difficult to maintain and manage a relational database. But it often contains valuable information useful for generating data insights, training machine learning models, or performing natural language processing (NLP).

In this article, I will introduce 7 advanced SQL techniques used to render unstructured data…