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Understanding Group and Over Aggregations in Flink SQL Group Aggregation 1.1 Basic Concepts Group aggregation in Flink (supported for both Batch and Streaming tasks) is a method of grouping data based on specific categories such as age, gender, or other dimensions. This differs from window aggregati...

Flink SQL Overview Table API and SQL represent the highest-level APIs within Flink. These two APIs are tightly integrated, with SQL operations being executed against Flink's Table abstraction. Consequently, they are often considered a unified layer. Flink provides a unified batch and stream processi...