How to Use SELECT DISTINCT in SQL to Remove Duplicates
When we start working with real datasets in data analysis, one issue appears very quickly—duplicate...
Tag: Data Preprocessing
How to Handle NULL Values in Data Analytics Queries
When we start working with real-world data in data analysis, one thing becomes obvious very quickly...
How to Group Data with GROUP BY for Summary Reports
When we work with raw data, everything often looks overwhelming. Thousands of rows, repeating value...
How to Use Aggregate Functions in SQL for Data Analysis
When we start working with data, individual rows rarely give us meaningful answers. Looking at one ...
How to Sort Results with ORDER BY in SQL for Data Analysis
Have you ever written a SQL query, looked at the results, and felt something was off—not because th...
How to Clean Messy Data Using SQL for Data Analysis
Have you ever run a SQL query, felt confident about your logic, and then looked at the results thin...
ETL vs Data Pipelines | Diffrence between ETL and data pipeline
If you're new to data analytics, you've probably noticed something confusing. The terms ETL and dat...
ETL with Excel: When and How to Use It Effectively
If you're picking up data analysis, there's probably an Excel spreadsheet already sitting open on y...
ETL Using SQL | Transforming Data with Real Queries
When you start learning data analysis, SQL often feels like a powerful but slightly intimidating to...
ETL in Power BI Using Power Query with examples
If you are new to data analysis, Power BI probably feels exciting and confusing at the same time. Y...