Lad os give revisoren en friaften, og løse det selv. 🙂
Total salgsmoms på ordrer i shoppen Q1 2019:
SELECT ROUND(SUM(`Presta_orders`.`total_paid_tax_incl` - `Presta_orders`.`total_paid_tax_excl`), 2) AS SalgsMoms FROM `Presta_orders` WHERE `Presta_orders`.`current_state` = 5 AND YEAR(`Presta_orders`.`invoice_date`) = 2019 AND QUARTER(`Presta_orders`.`invoice_date`) = 1