Category: AWS

  • Amazon Redshift Views, Sort Keys, and Outer Joins

    Amazon Redshift Views, Sort Keys, and Outer Joins

    My team built a process to load from a couple of base tables, in our Amazon Redshift enterprise data warehouse, into an other table which would act as a data mart entity. The data was rolled up and it included some derived fields. The SQL query had some complicity to it. This process ran daily […]

  • Amazon Redshift Unexpected Commit

    Amazon Redshift Unexpected Commit

    If you are familiar with sqlhammer.com, then you know that I heavily specialize in the Microsoft Data Platforms. My experiences with Microsoft, and specifically the SQL Server products, established an expectation that explicit transactions would always commit/rollback successfully or there would be an exception thrown to explain the problem. That expectation set the stage for […]

  • Amazon Redshift Temporary Tables

    Amazon Redshift Temporary Tables

    My company is in the middle of a migration to Amazon Redshift. Data warehouse design standards have been in question now that our platform is changing. One development team asked me whether they would be allowed to use temporary tables or not. They know that different database platforms handle temporary tables differently and there was […]

  • What is a cloud data warehouse?

    What is a cloud data warehouse?

    Amazon Redshift was announced in November of 2012 and became the first cloud data warehouse, opening a whole new segment of technology. What is a cloud data warehouse exactly? On-premises data warehouse While cloud data warehouses are relatively new, at least from this decade, the data warehouse concept is not. A data warehouse is a […]

  • AWS Database Migration Service

    AWS Database Migration Service

    I have begun writing a few blog posts focused on launching your databases into the cloud. Specifically targeted on database migration methodologies. Choosing a migration method involves making a lot of decisions up-front. This post will assume that Managed Relational Database Service (RDS), which is a Platform as a Service offering by Amazon Web Services […]