Creates comma-separated lists, tag collections, and concatenated values. Essential for displaying multiple related items in single row: product tags, employee skills, order items.

E-commerce Product Display

Display product tags and categories as comma-separated lists

E-commerce Product Display

SELECT product_id, STRING_AGG(tag_name, ', ') AS tags FROM product_tags GROUP BY product_id;

Frontend displays tags without multiple queries. API responses include all tags in single field.

All