Counting Integers and Strings Differently on Pandas: A Comprehensive Guide

Adding a Column to a DataFrame: Frequency of Variable

Optimizing Queries with SELECT COUNT(DISTINCT CASE WHEN ... THEN ... ELSE NULL END) and GROUP BY for Improved Performance in SQL.

Using SQL Server's PIVOT Statement to Handle Zero Values in Count() Functions

Identifying Alerts in R: A Step-by-Step Guide to Analyzing Stage-Specific Data

Finding Sailors Who Have Booked Every Boat: A Query-Based Approach

Counting Distinct IDs for Each Day within the Last 7 Days using SQL