Everyone makes streaming sound simple - until you try bolting it onto your batch pipeline and it blows up. This talk skips the marketing gloss and gets into the real work: how to make batch and streaming actually play nice. I will walk through the essentials, then get into the messy parts - compaction, primary key updates, exactly-once delivery, and keeping your compute bill from spiraling. You will learn how to plug RisingWave into your existing stack and get real-time results without rewriting everything. It is based on what we have seen in production - real problems, real fixes, no buzzwords.