“This is the best book on indexes that currently exists in the market” (Paul Barrett at Amazon.com)

“Beginners will find it an easy read but even our most senior developer learned from it” (Amazon Customer at Amazon.com)

“This book covers SQL in general but, importantly, makes it concrete by providing examples in *multiple* popular databases” (Sorpigal at Amazon.com)

“The book isn’t even 200 pages long. […] A worse author would’ve made this book 1000 pages long.” (rewazi at Amazon.com)