Postgresql, Redshift, Etl, Transformation, Data Warehouse.
elements of the array as records. unnest will return 5 rows if the array has 5 elements. Nomenclature — Say, there is an array called items. And we want to get the first 3 items of that array as columns, the nomenclature will be item_1, item_2 and item_3. We will store the complete array after