How many sales orders were processed by the store located in Chandler in 2020?
"Chandler" is the City Name; orders refers to OrderDate; in 2020 refers to Substr(OrderDate, -2) = '20'
SELECT SUM(CASE WHEN T2.`City Name` = 'Chandler' AND T1.OrderDate LIKE '%/%/20' THEN 1 ELSE 0 END) FROM `Sales Orders` AS T1 INNER JOIN `Store Locations` AS T2 ON T2.StoreID = T1._StoreID