select all eav attributes associated with a product

magento_product_attributes.sql

SELECT
    ce.sku,
    ea.attribute_id,
    ea.attribute_code,
    CASE ea.backend_type
       WHEN 'varchar' THEN ce_varchar.value
       WHEN 'int' THEN ce_int.value
       WHEN 'text' THEN ce_text.value
       WHEN 'decimal' THEN ce_decimal.value
       WHEN 'datetime' THEN ce_datetime.value
       ELSE ea.backend_type
    END AS VALUE,
    ea.is_required AS required
FROM catalog_product_entity AS ce
LEFT JOIN eav_attribute AS ea 
    ON ce.entity_type_id = ea.entity_type_id
LEFT JOIN catalog_product_entity_varchar AS ce_varchar 
    ON ce.entity_id = ce_varchar.entity_id 
    AND ea.attribute_id = ce_varchar.attribute_id 
    AND ea.backend_type = 'varchar'
LEFT JOIN catalog_product_entity_int AS ce_int 
    ON ce.entity_id = ce_int.entity_id 
    AND ea.attribute_id = ce_int.attribute_id 
    AND ea.backend_type = 'int'
LEFT JOIN catalog_product_entity_text AS ce_text 
    ON ce.entity_id = ce_text.entity_id 
    AND ea.attribute_id = ce_text.attribute_id 
    AND ea.backend_type = 'text'
LEFT JOIN catalog_product_entity_decimal AS ce_decimal 
    ON ce.entity_id = ce_decimal.entity_id 
    AND ea.attribute_id = ce_decimal.attribute_id 
    AND ea.backend_type = 'decimal'
LEFT JOIN catalog_product_entity_datetime AS ce_datetime 
    ON ce.entity_id = ce_datetime.entity_id 
    AND ea.attribute_id = ce_datetime.attribute_id 
    AND ea.backend_type = 'datetime'
WHERE ce.sku = 'sku'
ORDER BY attribute_code;