<a href="https://s3.amazonaws.com/periscope-blog-assets/lazy-analysts-guide-to-faster-sql.pdf" rel="nofollow">https://s3.amazonaws.com/periscope-blog-assets/lazy-analysts...</a><p>Link for those who don't want to give an email address and name (that will undoubtedly be used for marketing purposes, I'm sure).
With our product (Periscope), you type SQL and get charts from your SQL database. We spend a lot of time helping customers with their SQL queries and also write a lot about SQL on our blog. So we thought it'd be a good idea to put together a free guide on writing faster queries. Hope you enjoy it!