Every data engineering interview includes a SQL round. If you are: > Worried about job descriptions asking for advanced SQL, but you are not sure what advanced SQL means for an interview > Having anxiety about being unable to get a job > Frustrated with online SQL courses teaching the basic dialects, but not a step-by-step approach to problem solving If so, this post is for you. Imagine being able to dissect any SQL problem and make the interviewer say, I need this person on my team. That is ...| www.startdataengineering.com
Are you disappointed with online SQL tutorials that aren't deep enough? Are you frustrated knowing that you are missing SQL skills, but can't quite put your finger on it? This post is for you. In this post, we go over a few topics that can take your SQL skills to the next level and help you be a better data engineer.| www.startdataengineering.com
In this post, we go over 6 key concepts to help you master window functions. Window functions are one the most powerful features of SQL, they are very useful in analytics and performing operations that cannot be done easily with the standard group by, subquery and filters. Despite this, window functions are not used frequently. If you have ever thought 'window functions are confusing', then this post is for you.| www.startdataengineering.com
This post goes over what the ETL and ELT data pipeline paradigms are. It tries to address the inconsistency in naming conventions and how to understand what they really mean. Finally ends with a comparison of the 2 paradigms and how to use these concepts to build efficient and scalable data pipelines.| www.startdataengineering.com
Wondering how to store a dimension table's history over time and how to join these historical dimension tables with fact tables for analytical querying ? Then this post is for you. In this post, we will go over a popular dimension modeling technique called SCD2, which preserves historical changes. We will also see how to join a fact table with an SCD2 table to get accurate point in time information.| www.startdataengineering.com
Confused by all the tools and frameworks available to scale your data pipeline? Then this post is for you. In this post, we go over what scaling is, the different types of scaling, and how to choose scaling strategies for your data pipelines. By the end of this post, you will be able to come up with the correct scaling strategy for any data pipeline.| www.startdataengineering.com