Depending on the skills and needs of the people doing the queries, just provide a set of template SQL queries. My wife frequently need to query sales data from

Depending on the skills and needs of the people doing the queries, just provide a set of template SQL queries. My wife frequently need to query sales data from their POS system. The developers provide small SQL query window, along with a set of predefined queries. New templates can be pushed if the database changes and users can easily change parameters or make small modifications to the queries if they need to.