Conditional logic is implemented within SQL queries using a specific structure. This structure evaluates conditions and returns different results based on whether those conditions are true. As an illustration, consider the need to categorize customer spending. A query could assign the label “High Value” to customers whose total purchases exceed a predefined threshold and “Standard” to all others. This allows for data-driven segmentation directly within the SQL process.
The ability to apply conditional logic directly within SQL queries enhances efficiency and reduces the need for post-processing. This method centralizes decision-making within the database engine, leading to faster execution and simplified code. Historically, such conditional assignments might have been handled outside the database, adding complexity and potential performance bottlenecks. The in-database approach offers a more streamlined and robust solution.
