Flink SQL: Joins Series 3 (Lateral Joins, LAG aggregate function)
出处：
www.ververica.com
作者：
Ververica
Flink SQL has emerged as the de facto standard for low-code data analytics. It has managed to unify batch and stream processing while simultaneously staying true to the SQL standard. In addition, it provides a rich set of advanced features for real-time use cases. In a nutshell, Flink SQL provides the best of both worlds: it gives you the ability to process streaming data using SQL, but it also supports batch processing.
