Tag Archives: filters

Debugging sql joins and filters in Oracle

This is a basic tip that will save time when a query isn’t returning the expected results (typically, it’s bringing back an empty set) and you need to find out which join or WHERE clause filter is causing the problem. It’s not impossible to do, of course, but it’s nice to have a method that gets a result quickly without too many edits. Take the following query, which should run on your Oracle instance: Continue reading Debugging sql joins and filters in Oracle