CASE WHEN in SQL for Conditional Analysis in DA
When we analyze sales and marketing data, numbers alone are often not enough. We frequently need to...
Tag: SQL Functions
What Does COALESCE Do in SQL? Learn with Business Examples
When we work with real sales and marketing data, missing values are unavoidable. A customer may not...
How to Detect and Remove Outliers in SQL for Cleaner Analysis?
When you're working with real sales & marketing data, be prepared for outliers to pop up - beca...
How to Use Window Functions for Totals and Ranks in SQL
When we move beyond basic SQL in data analysis, we often reach a point where simple GROUP BY querie...
What Are Window Functions in SQL?
When we move deeper into data analysis using SQL, we quickly realize that basic queries with SELECT...
How to Use LIMIT and TOP to Sample Large Datasets
When we work with real datasets in data analysis, tables can quickly grow into thousands or even mi...
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 develop a secure PHP Login System (Complete Guide)
Building a secure login system in PHP isn't just about checking if someone typed in the right usern...
SQL for Data Analysis: Queries, Joins, and Real-World Examples
When you step into the world of data analysis, SQL quickly becomes one of your most powerful tools....
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...