Gaelim Holland
Author Archives: Gaelim Holland

Filter Data with Python Query

I believe there a several Python functions that every data analyst should learn. VALUE_COUNTS, GROUPBY and QUERY is also on the list. Of course all these are part of the PANDAS library. So Let’s explore the query function. This function allows for filtering data frames using a concise and readable syntax. What is the basic […]

3 Ways to Calculate Percent Change in Python

Percent change using Pandas is one of the easiest ways to get the percent change formula. This can be done with a single line of code. However, you will need to use a data frame from the Pandas package to do this. I will show you multiple ways to calculate percent change with ease. Do […]

Tableau vs. Power BI in 2023

Power BI and Tableau are the two most important data visualization tools. Both tools are used for data analysis, manipulation, and visualization to get insight from the data. However, both have their own unique selling point. Diving under the hood will tell you which solution is best for your specific use-case. In this blog, we […]

Extracting Zip Codes from Data in SQL

When dealing with large datasets, particularly those related to addresses or geographical locations, there’s a good chance you’ll need to extract or work with zip codes. SQL, as a powerful language for managing and querying databases, offers a range of tools and techniques to help you handle zip codes efficiently. 1. Basics of Zip Codes […]

SQL Union vs Union ALL

Union and Union All are two of the most important functions you will come across in SQL. There are must-to learn and easy to master. So I am going to provide you with a a few examples of using these SQL functions. Here’s what we’ll cover: What is the Difference between Union and Union All […]

How to Use Python FOR LOOPS

Python’s for loop is a versatile tool for iterating over data, essential for any business dealing with datasets. Let’s dive right into how businesses can leverage this. Basic Syntax for variable in iterable: This is the fundamental syntax of the “for” loop in Python . What’s an iterable? An iterable is any Python object you […]

3 Ways to RANK Data in SQL

What are the Ranking Functions in SQL There are 3 simple functions that you can use to rank data in SQL. If you are in a rush and want to dive right into learning how to use these ranking functions in SQL. Check out the YouTube short: Here are the ranking functions that will show […]

How to Use Block Comments in Python

You can easily create multi-line comments in Python with ease by using quotations. The # docustring will only allow you to comment per each line. However triple quotation “””” or ”’ should easily allow you to create multiple-line comments. Using Triple Quotes for Multi-line Python Comments Even though triple quotes are primarily used for docstrings […]

Analysis vs Analytics

Have you ever wondered if these two terms are different or the same? Let’s explore the details and use cases. In a nutshell, while both analysis and analytics are vital in the modern world, they serve different purposes. Analysis is about understanding and interpreting data to explain past or current phenomena. In contrast, analytics is […]

SQL Where String Contains Substring

In this tutorial, you will find out many ways to find substrings in SQL regardless of the DBMS. We will cover conventional operators like ‘LIKE’, ‘CONTAINS’, ‘CHARINDEX’, and many others. So buckle up and get started or just scroll to find the exact way to use find exactly where strings contain substring Watch The Video […]

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