Creating a Column Based on Substring of Another Column Using `case_when` with Alternative Approaches

Understanding SQL Case Statements: A Comprehensive Guide to Conditional Expressions and Return Values

Creating Custom Columns Based on String Length in SQL Server

Understanding Case Statements and Aliases in SQL Server: Workarounds and Best Practices

Filtering Group By Results Based on a Value from Another Column in PostgreSQL

Alternatives to PIVOT: Using CASE for Data Manipulation Instead

Optimizing Complex WHERE Clauses in SQL Server: Strategies for Reduced Performance Impacts