How to get sku and their tax_class_id is not equal to 'vat standard'

[subs s]

I want to get sku and their tax_class_id is not equal to 'vat standard'. I use following code and got sku and tax_class_id (it's showing 5). But I got another table called 'tax_class' which has a class_id and 5 means 'VAT Standard'. I want got get sku which does not have 5 as tax_class_id. How can i join tax_class with this code as it does not have entity_id, attribute_id or so on? Can anyone help?

SELECT e.sku, eav.value AS vat
FROM catalog_product_entity e
JOIN catalog_product_entity_int eav
ON e.entity_id = eav.entity_id
JOIN eav_attribute ea
ON eav.attribute_id = ea.attribute_id
WHERE ea.attribute_code = 'tax_class_id'