In most of the cases, we pay lots of attention to improve the performance of the web application, but ignore the back-end SQL performance tuning. Amazon Redshift is a fully managed, petabyte-scale, massively parallel data warehouse that offers simple operations and high performance. Amazon Redshift can run a data model such as production transaction system third-normal-form model, star and snowflake schemas, data vault, or simple flat tables. This article takes you through the most common performance-related opportunities when writing query in Amazon Redshift and gives you concrete guidance on how to optimize…