This might be a vast topic ,but for SQL novice like me it is quite pertinent and of extreme importance. In my project I have to regularly deal with quite complex and lengthy code, and I often struggle to debug and understand what actually code is doing.I know for subqueries with start with inner most query. I would be grateful for the information, how experts debug the queries and what approach or steps they follow. I have googled and came across few links as below: https://www.dataversity.net/debugging-complex-sql-queries/# Thanks a lot.