Data Cleaning Basics: Techniques Every Analyst Must Know
Here's the truth about data projects: the first thing you'll run into is messy data. Every single t...
Tag: Data Analytics
Data Sources and Collection Methods for Effective Data Analysis
When you're working with data—whether you're making business decisions, doing research, or building...
Levels of Measurement in Data Analysis: Nominal to Ratio Data
When you and I start analyzing any dataset, it's not enough to know the type of data—we also need t...
Types of Data in Data Analysis: A Beginner-Friendly Guide
When you and I talk about data analysis, the first thing we must understand is the type of data we'...
Types of Data Analysis and When to Use Each One
When you and I talk about data analysis, we're really talking about different methods we use to und...
What Is Data Analysis? A Complete Beginner’s Guide
When you hear the term "data analysis (DA)," you might imagine huge spreadsheets, charts, or comple...
Query Optimization in SQL: Techniques and Best Practices
When I first started writing SQL queries, I honestly only cared about getting the correct output. I...
Database Normalization: From Messy Tables to Perfect Structure
When I built my first database years ago, I thought keeping everything in one big table was the eas...
Understanding ACID Properties in Database Transactions
When you're transferring money online, booking tickets, or making any critical transaction, ACID pr...
SQL Aggregate Functions: Summarize, Count, and Analyze Data
If you work with databases, you often need to turn large amounts of data into useful numbers. SQL a...