How to Pivot File Metadata in MySQL Using GROUP_CONCAT()?

Pivot Entity-Attribute-Value Schema in MySQL

The task at hand is to design a schema that efficiently stores file metadata, including both standard and user-defined attributes. The challenge is to retrieve this data in a flattened format, exhibiting all custom attributes associated with each file.

To address this, let's explore the concept of data pivoting, a technique often employed in relational databases to transform row-based data into column-based form.

In this case, the goal is to pivot the custom attributes stored in the FileAttributes table to achieve the desired tabular representation. The GROUP_CONCAT() function provided by MySQL offers a convenient solution.

Consider the following query:

SELECT
    bt.FileID,

The above is the detailed content of How to Pivot File Metadata in MySQL Using GROUP_CONCAT()?. For more information, please follow other related articles on the PHP Chinese website!