You mentioned database constraints and testing already, which are great automated methods. Besides these automated methods another way to monitor data integrit

You mentioned database constraints and testing already, which are great automated methods. Besides these automated methods another way to monitor data integrity is for a human to manually analyze the data for inconsistencies. And to ask other domain experts at your company to analyze the data for issues. Sometimes this is called the “smell test”. This method can be an effective way to find deeper integrity issues with your data that would be hard to find with automated tests. Maintaining data integrity is very difficult, domain dependent, and takes lots of work. Good luck!