Retrieving Top 1 Row per Group: A Flexible Approach to Data Analysis

Update Table with Rank Number Using a Subquery in SQL

How to Get Record Count for Each Day of the Week in SQL Server

Inserting Data from Two Columns into New Columns in a SQL Query.

Handling Multiple Allowances in SQL Queries: A Better Approach with OUTER APPLY

Displaying Values for Non-Existent Column in SQL Server Using Various Techniques

Extracting Minimum and Maximum Dates from Multiple Rows by Sequence

Transforming Duplicate Rows with SQL Self-Joins and Data Modeling Techniques

Optimizing SQL Queries with Sub-Queries and Common Table Expressions

Handling Missing Values in Joins: Mastering Left Joins to Avoid Data Inconsistencies