Why can heavily normalized transactional databases be difficult for business users to query directly for reporting?

Which description best matches structured data?...

A team stores device events as JSON documents where fields can vary between records. How should this...

A media company is archiving product photos and training videos. Which type of data is it primarily ...

A new order management application requires joins, strong consistency, and a fixed schema. Which typ...

A finance team exports daily sales data as comma-delimited text files with one row per transaction. ...