Mastering SQL Count then Sum Operations: A Step-by-Step Guide to Analyzing Data with Aggregate Functions

Counting Values in Column with Ranges Given a Specific Condition

How to Fix "Group By" Error in DB2 Query with Distinct Count

Filtering and Counting Consecutive Records with a Given Status in SQL

Counting Rows Per Group in R Data Frames Using Multiple Methods

Solving Date Manipulation Challenges: Counting Sessions by 15-Minute Intervals in Business Days

Mastering SQL Subqueries and Joins: A Comprehensive Guide to Relational Database Queries