Comprehensive and Detailed Explanation From Exact Extract:

Pega’s reporting framework, as described in Pega Academy’sReporting Missionand thePega Certified Lead System Architect Study Guide, supports SQL-based function aliases in Report Definitions to categorize data. The CASE statement is the standard SQL construct for conditional logic in Pega reports.

Option A (Correct): The CASE statement CASE WHEN {1} < 500 THEN 'Silver' WHEN {1} BETWEEN 500 AND 2000 THEN 'Gold' ELSE 'Platinum' END accurately categorizes customers based on total booking amounts. It is syntactically correct and aligns with Pega’s SQL function alias syntax, as documented in theFunction Aliassection of Pega Community.

Option B (Incorrect): The IF statement is not standard SQL syntax in Pega’s reporting framework. Pega uses CASE for conditional logic in Report Definitions, per theReport Definitionmodule.

Option C (Incorrect): Similar to Option B, IF is not supported in Pega’s SQL functions. The correct construct is CASE, as noted in theSQL Functionsguidelines.

Option D (Incorrect): The SELECT keyword is unnecessary in a function alias, as it is used in full SQL queries, not inline expressions. The CASE statement alone is sufficient, per theFunction Alias Configurationmodule.