Exam DP-600 topic 1 question 159 discussion

BEGIN DISTINCT 🎯 When to Use What? Scenario Use Standard stored procedure with single-database operations ✅ AS BEGIN Multi-database transaction requiring rollback if one step fails ✅ AS BEGIN DISTRIBUTED TRANSACTION Changing session settings before executing queries ✅ AS SET DISTINCT because: Given that you need to deduplicate the signindata table, here's the logic behind choosing DISTINCT or GROUP BY: If you want to deduplicate based on certain fields (like UserID and SignInTime), DISTINCT is simpler and more straightforward. If you want to apply an aggregation (like counting, summing, etc.) while also deduplicating, GROUP BY would be appropriate. Why Choose DISTINCT in This Scenario? If you're simply deduplicating and not applying any aggregation, DISTINCT is the right tool. You only need to ensure that each row is unique based on a combination of columns (e.g., UserID and SignInTime).