[senthadev]

pipeSQL author here:

Sorry, I didn't understand your answer. It is very important to understand the complex query in-order to debug or re-engineer. One way is to visualise it as mentioned in the article and convert it to SQL via pipeSQL.

[collyw]

I personally haven't found visual tools made querying any easier, just a new way of doing things - essentially a new syntax. Practising normal SQL and being able to visualize it in my head has been far more use than any visual tools have been to me.