What is an example of unstructured data?

Historical stock inventory is structured data stored in rows and columns with defined fields such as item ID, quantity, and date.

Product ratings are numerical or categorical structured data that fits into a predefined schema with consistent, uniform fields.

Customer orders are structured data records with well-defined fields like order ID, product, quantity, and price stored in relational databases.

Call center transcripts are free-form natural language recordings with no predefined schema, varying in length, content, and structure. Unlike database records, transcripts cannot be stored in a simple tabular format, making them a classic example of unstructured data that requires specialized tools like NLP to analyze.