SQL Group By and Sum of Other Column: Mastering Complex Aggregations with Window Functions

Understanding Sum Over Windowed Function and Its Potential Pitfalls: Avoiding Common Errors with Proper Window Specification

Controlling SQL Updates: Determining Which Row to Update with JOINs

How to Handle Duplicate Data in SQL: Using Various Techniques for Clean Data Sets

Understanding Transaction Isolation Levels in SQL Server for Stronger Consistency Guarantees

Parsing Full Names with SQL Server: Effective Techniques for Extracting Initials

Fixing the Mysterious Case of Cannot-Update-DateTime Table: A Guide to Safe Datatype Specifications and Parameterized Queries.

How to Properly Implement INITCAP Logic in SQL Server Using Custom Functions and Views

Optimizing SQL Code for Efficient Data Manipulation and String Splitting Using XML

Merging Duplicate Rows in SQL Server: A Comprehensive Guide