Aggregate functions help turn large datasets into simple summaries used across many fields. GROUP BY and HAVING allow structured grouping and filtering of data for clearer reports. Functions like ...

This repository demonstrates a common SQL error involving the incorrect use of aggregate functions without a GROUP BY clause. This can lead to inaccurate results when ...

#' * `sql_not_supported()` creates a function that throws an informative error #' when a function is not supported in SQL. #' * `sql_check_na_rm()` is a helper that ...