摘要：
Intro process 就是 The process component is where services manipulate data into needed forms. 比如补齐 null value, make data more consumable. analyze 比如排序、聚 阅读全文
摘要：
finalDF.withColumn("NEW_COLUMN", max("start_date").over()).show() Ref: https://stackoverflow.com/questions/59199685/create-a-new-column-with-max-value 阅读全文