The Problem With Consistency in SQL Queries

Marketing would have this really smart analyst that would run a super complex query. And then somewhere across the company in inventory, they'd run similar queries to calculate how much revenue we bring in on sales. But there would be like some minutia of of something in the query that wasn't quite consistently doing the two. It's not just accessibility of the metrics, but consistency is a massive problem. There needs to be a technology dissolution to solve this.