Using an "Or" Conditional in the `n_distinct` Function of Dplyr: A Flexible Approach to Summarize Counts for Multiple Conditions

Using Joins for Better Performance When Counting Words Across Two Tables

Conditional Aggregation in SQL: A Comprehensive Guide to Counting Occurrences of Values

Counting Records from Another Table as a Name in Laravel Eloquent Using DB::raw()

Counting Distinct Units with Condition Based on Different Column in SQL

Understanding Oracle SQL Count and Group by Multiple Fields

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

Displaying Zero Records for Different Conditions Using SQL Server Conditional Logic Techniques

Optimizing COUNT with GROUP BY in MySQL: Strategies for Performance Improvement