Advanced SQL Querying for Extracting Specific Values from a Column

Counting Active Systems by Month: A Comprehensive Approach

Handling Duplicate Columns with SQL: A Step-by-Step Guide to Grouping and Aggregation

Modifying a WITH CTE AS Statement: Handling Blank Customers and Order by Clauses with CTE Update Strategies

How to Filter Dates with Time Component: Handling Logic for From and To Times

Understanding SQL Queries and Percentage Calculations: Avoiding Common Pitfalls for Accurate Results

Using Table-Value Constructors and UPDATE Statements in SQL: A Comprehensive Guide to Efficiency, Readability, and Flexibility

Optimizing Subqueries with NOT EXISTS vs IN: A Guide to Correct Query Design

Calculating Daily Sales Excluding Weekends in SQL Server

T-SQL Aggregation of Overlapping Date Times From Large View: A Scalable Solution