Zahin Rahman

Nuclear Engineer by day and Data Scientist by night, Zahin is passionate about driving business with data. He has 5+ years of industry experience in energy and power generation and has a master’s degree in Engineering with a focus in Data Science. He loves learning, whether from an industry veteran or a high school science enthusiast.

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21 Jul 2020

Zahin Rahman

Using GROUP BY in SQL

Now that you know SQL’s core commands, power up your queries with the GROUP BY clause and aggregate functions. GROUP BY is a SQL clause that arranges data into groups based on a common value (or values). It is widely used to obtain summary information for large datasets as well as for computing basic aggregate statistics. Once you have grasped SQL’s basic commands like SELECT, WHERE, and JOIN, mastering the GROUP BY clause can help you implement your SQL knowledge in real-world business intelligence scenarios.

2 Jun 2020

Zahin Rahman

How to Learn SQL JOINs

JOINs are one of the most fundamental and commonly used SQL commands for manipulating and querying real-world data sets. They are also one of the more challenging SQL topics to master! In this article, you’ll learn an effective strategy to learn the different types of SQL JOINs. When data is stored in a single table, we can easily retrieve rows and get all the information we need. But when businesses scale, so does their data.