Counting Repeat Callers Per Day Using SQL Window Functions

Retrieving Records in Last 24 Hours with Matching Data and Maximum Value

Correctly Removing Zero-Quantity Items from XML Query Results

Passing Multiple Values into a Stored Procedure (Oracle) Using Dynamic SQL

Counting and Grouping Data: A Deeper Dive into SQL Queries with Examples and Best Practices for Complex Data Sets

Updating Data Between Tables in SQL Server Using JOIN Operations

Calculating Time Duration Based on a Series in a Column When the Series Changes: A Gap-and-Islands Problem Solution Using Cumulative Sum Approach

Unlocking Data Freshness in AWS Athena: How to Determine Last Modified Timestamps and More

Understanding SQL Approaches for Analyzing User Postings: Choosing the Right Method

Excluding Empty Columns from SQL Server Select Statements Using Various Techniques