Counting Cars Rented Per Month in PostgreSQL

Writing Per-Variable Counts with Data.tables in R: Efficient CSV File Output Using l_ply Function

Counting Rows with Different Row Counts for Each Column in Pandas Dataframe

Using the count Function in a Loop in R: A Guide to Avoiding Common Issues

Simplifying SQL Queries Using Conditional Aggregation

Mapping Distinct Values to Counts in a Chart with ggplot2: A Comparative Analysis of geom_bar() and geom_col()

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

Combining Two SQL Statements with Same Stem but Different WHERE Clause: A Simplified Solution

Solving BigQuery Standard SQL: Counting Active User Events Over Three-Day Windows

SQL Logic to Fail a Check if Any of the Related Customers Have Failed