Basic wizard guide to Dune SQL and Ethereum data analytics

This guide introduces the basic concepts needed for analysis in Dune SQL on Ethereum and other EVM chains, presenting it as a first step for beginners. It explains how raw transactions, traces and logs relate to one another, how decoded tables are built from contract ABIs, and how spellbook and community datasets are structured. It also covers core SQL clauses and types, and advises filtering on time and joining on unique hash or ID columns as the main optimization tip.