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第24天:Spark Structured Streaming
!第24天封面图片:Spark Structured Streaminghttps://media2.dev.to/dynamic/image/width=1000,height=420,fit=cover,gravity=auto,format=auto/https%3A%2F%2Fra...
!第24天封面图片:Spark Structured Streaminghttps://media2.dev.to/dynamic/image/width=1000,height=420,fit=cover,gravity=auto,format=auto/https%3A%2F%2Fra...
1. PySpark 中的 Join —— ETL 流程的核心 Join 根据键合并两个 DataFrame,类似于 SQL。基本 Join 示例:python df.join(df2, df.id == df2.id, 'inner')